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 48/2(9+3) = x

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48/2(9+3) = x
x = 288
52%
 52% [ 12 ]
x = 2
48%
 48% [ 11 ]
Total Votes : 23
 

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_Melissa.
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PostSubject: Re: 48/2(9+3) = x   Tue Apr 12, 2011 9:06 am

lol huh? 288/ 48= 6... Which isn't needed to calculate that lol =)

Hope my 2 was correct, being wrong sucks but otherwise wanna know so I can be right.

The way I saw it was outside number of bracket, times inside bracket numbers. To create multiplied version of new figures in the bracket. That whole new bracket of numbers gets divided by the outside number, which is before the slash.

Sometimes there's possibly more than 1 answer that can be given credit to though for different answers, which can be the case with financial ratios. As there's different ratios sometimes taking into account net income for profit etc. As long as the working out is there, should be OK and reasonable justification as to how the answer was found. http://en.wikipedia.org/wiki/Financial_ratio#Ratios
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PostSubject: Re: 48/2(9+3) = x   Tue Apr 12, 2011 9:11 am

It's funny tho, engineers and mathematicians are arguing this all over the place on the interwebs... Razz

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PostSubject: Re: 48/2(9+3) = x   Tue Apr 12, 2011 9:19 am

anto_capone wrote:
It's funny tho, engineers and mathematicians are arguing this all over the place on the interwebs... Razz
Personally I find this interesting and think about it whilst cutting an orange, going wow...

Skip to after 1min http://www.metacafe.com/watch/769025/270_degree_triangle_yes_3_right_angles/
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PostSubject: Re: 48/2(9+3) = x   Tue Apr 12, 2011 2:33 pm

Edwin wrote:
I don't think it works that way Razz I'm not much of brains in chemistry Razz Although I'm quite sure the kiddo will be a handsome/beautiful one. *looks at Tel* Rolling Eyes Embarassed

Nope. No plans for that.

What's wrong with simply a fluffy kitteh? Laughing

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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 11:35 am

anto_capone wrote:
48
___
2(9+3)

Razz

The answer is 2 for that one.
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 11:44 am

I always learned it as PEMDAS. Funny to know there's a different name for it. I dont remember shit that I learned so I'm inclined to say the answer is 24. Parentheis added, then each number outside them multplied by 12 separately and divided.

9+3=12
12*2=24
48*12=576
576/24=24


But then again, I don't remember the rules and it could be that only 2 is multiplied what is in the parenthesis and then it's all added and divided.

Damned soggy memory.
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 1:54 pm

Elois wrote:
I always learned it as PEMDAS. Funny to know there's a different name for it. I dont remember shit that I learned so I'm inclined to say the answer is 24. Parentheis added, then each number outside them multplied by 12 separately and divided.

9+3=12
12*2=24
48*12=576
576/24=24


But then again, I don't remember the rules and it could be that only 2 is multiplied what is in the parenthesis and then it's all added and divided.

Damned soggy memory.

You basically made:

48
2

or even

48 * 12
2 * 12

which is an error as:

12
12

gives 1 and not 12 you have calculated earlier.
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 3:10 pm

Edwin wrote:
anto_capone wrote:
48
___
2(9+3)

Razz

The answer is 2 for that one.

its the same thing tho.. the only symbol there is the division symbol, so it can be properly expressed as a fraction.

unless you think it is

48
___ (9+3)
2

But that means it should have been written as 48/2X12 instead of implying the multiplication no? the 2(9+3) needs to be simplified first i think...

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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 3:19 pm

You come tutor me, Edwin?
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 3:38 pm

288 by the way I learned it. I was always taught we didn't need a multiplication symbol between a number and a bracket - it being there implied that it was to multiply the result of the brackets.
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 13, 2011 10:32 pm

anto_capone wrote:
Edwin wrote:
anto_capone wrote:
48
___
2(9+3)

Razz

The answer is 2 for that one.

its the same thing tho.. the only symbol there is the division symbol, so it can be properly expressed as a fraction.

unless you think it is

48
___ (9+3)
2

But that means it should have been written as 48/2X12 instead of implying the multiplication no? the 2(9+3) needs to be simplified first i think...

Basically the calculators have problem distinguishing between whether it's 48/2 and that multiplied by (9+3) or is it 48 divided by 2 brackets of 9+3. Some of the constructors have assumed that it was two brackets of 9+3 while others that the fractal is then multiplied by it. Therefore the confusion. The machine doesn't know should it divide by the 12 or multiply by it... That is totally dependant on if the manufacturer decided to take short cuts or not Smile
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PostSubject: Re: 48/2(9+3) = x   Thu Apr 14, 2011 3:20 pm

unless they really changed the math since i was in school
in my head real fast i came up with 2

i graduated hs in 72
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PostSubject: Re: 48/2(9+3) = x   Mon Apr 18, 2011 2:48 pm

Telcara wrote:
... *head explodes*

*nods* Actually, I am contemplating crawling under the desk and crying.

I am gearing up to study for the GRE (yup, I have to get ready to get ready) and am having massive anxiety about the math portion. I'd love a tutor, but am terribly embarassed as to how stupid I am about numbers.

Instead, I will partially read your posts in awe and confusion. Very Happy
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PostSubject: Re: 48/2(9+3) = x   Mon Apr 18, 2011 5:34 pm

James wrote:
Bekah wrote:
Under the principals of bodmas, brackets get calculated first so that would be the 9 + 3 = 12, then you have to do the division and multiplication, left to right so you have 48 /2 = 12 x 12 = 288 So it seems that the logic function of a couple of those calculators is incorrectly input. Just goes to show you that the brain is not about to replaced anytime soon Very Happy

Right answer Bekah, but 48/2 is 24 not 12 Razz

x = 48 / 2 (9 + 3)
x = 48 / 2 (12) <-- Brackets are first
x = 24 * 12 <-- Division and Multiplication from left to right so first 48 / 2
x = 24 * 12 <-- then 24 * 12
x = 288
This is the correct answer to the thread title as written.

You take care of brackets first and then it must be interpreted as " 48 / 2 * 12 = x " and you have to calculate from left to right, division and multiplication commands bearing the same weight.

The problem is that in calculators and on forums because of line spacing and all that, we don't have a good way of consistently expressing

anto wrote:

48
______ =x
2(9+3)

Which for the answer indeed is 2. It's the same as writing it like this:



In anto's example, 2(9+3) is the denominator. It's not the same as " 48/2(9+3) = x "; When expressed this way, it's not a fraction, or in other words the whole equation has a denominator of 1.
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PostSubject: Re: 48/2(9+3) = x   Tue Apr 19, 2011 5:52 pm

My hero!

*flutters her eyelashes at him*

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PostSubject: Re: 48/2(9+3) = x   Tue Apr 19, 2011 8:43 pm

So this mathematician is wrong? Razz

Quote :

The distributive property of multiplication CLEARLY states that the 2(9+3) is an entire statement and CANNOT be broken up. 2(9+3) follows the distributive property which can be rewritten as (2*9+2*3). Let me repeat the 2 outside of the parenthesis follows the distributive property of multiplication and must be factored and simplified before performing any other operations on it. You do NOT compute this expression from left to right until you use Algebra to simplify the statement 2(9+3).

So this can be rewritten as:
48 / (2*9 + 2*3)

Which leaves us with

48 / 24 = 2

Answer = 2.

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PostSubject: Re: 48/2(9+3) = x   Tue Apr 19, 2011 9:02 pm

must be Razz

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PostSubject: Re: 48/2(9+3) = x   Tue Apr 19, 2011 9:29 pm

Anto is correct here in the technical sense -- brackets don't necessarily indicate algebraic expression, but solving for X does. The problem is in the way the problem is expressed in the thread title

48/2(9+3) = x

There are no variables in the subject - it's a monomial equation and I wouldn't be compelled to distribute the 2 through the parentheses with the problem spaced like that. It's better written with spacing,

48 / 2(9+3)

then it's understood the way Anto says (and generally if it's expected you'll distribute through a side of an equation with no variables it will be expressed with brackets, not just parentheses)

48 / [2(9+3) + 0] = x

I wouldn't mark anyone off for answering 288. Spacing is important
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 20, 2011 5:58 am

anto_capone wrote:
So this mathematician is wrong? Razz

Quote :

The distributive property of multiplication CLEARLY states that the 2(9+3) is an entire statement and CANNOT be broken up. 2(9+3) follows the distributive property which can be rewritten as (2*9+2*3). Let me repeat the 2 outside of the parenthesis follows the distributive property of multiplication and must be factored and simplified before performing any other operations on it. You do NOT compute this expression from left to right until you use Algebra to simplify the statement 2(9+3).

So this can be rewritten as:
48 / (2*9 + 2*3)

Which leaves us with

48 / 24 = 2

Answer = 2.

No, but he doesn't know a bit about programming calculators Razz
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PostSubject: Re: 48/2(9+3) = x   Thu May 19, 2011 8:53 pm

The answer is two. Very Happy


EDIT: I should probably say why I thinks its two since all the adults are doing it.


But, now that you bastards made me over think it. My opinion is that 288 and 2


48/2(9+3) = 2
48/2(12)
48/24=2

Thats the answer I'd pick.

But it could by the way i was thought BIRDMAS

48/2(9+3) = 288
48/2(12)
12(12) = 288


ACTUALLY.... I just realised why it can't be 288 even with birdmas...

The bracket is still there last and they have to go first so it has to be 2. Errrr, right? Very Happy

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PostSubject: Re: 48/2(9+3) = x   Mon May 23, 2011 5:08 pm

I think this is 288, but i change my mind Smile. This is 2 (if you look in other side)

Because this (can be) isnt

48
--- x (9+3)
2


This (can) be

48
----
2(9+3)

so the answer is simple Wink


I think this is about how we look at this
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PostSubject: Re: 48/2(9+3) = x   Mon Apr 15, 2013 3:36 pm

I thought I would test people's maths skills once again. What is the answer to this problem?

4 x 4 + 4 x 4 +4 - 4 x 4 = ?


And don't worry, 73% of people get it wrong Very Happy

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PostSubject: Re: 48/2(9+3) = x   Mon Apr 15, 2013 7:33 pm

Bekah wrote:
I thought I would test people's maths skills once again. What is the answer to this problem?

4 x 4 + 4 x 4 +4 - 4 x 4 = ?


And don't worry, 73% of people get it wrong Very Happy

20? (took me forever! lol and I still don't think it's right haha)

Holy crap, had an awful vision of me in math class 15+yrs ago...*shudders*

Laughing

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PostSubject: Re: 48/2(9+3) = x   Tue Apr 16, 2013 3:39 am

I think Trinity is right.

4 x 4 + 4 x 4 +4 - 4 x 4 = ?

16 + 16 + 4 - 16 = ?

36 - 16 = 20
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PostSubject: Re: 48/2(9+3) = x   Wed Apr 17, 2013 5:04 am

Bekah wrote:
I thought I would test people's maths skills once again. What is the answer to this problem?

4 x 4 + 4 x 4 +4 - 4 x 4 = ?


And don't worry, 73% of people get it wrong Very Happy

16+ 16 + 4 - 16 =

36 - 16 = 20

I think Aoife is right that Trinity is right :-)

The rule is you do exponents first, then square roots then parenthesis then multiplication then division the addition then subtraction

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