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reply to post by safetyblack
I can answer this simply. I've been teaching high school math for 8 years and I can assure you the answer is 2. Maths is a langauge and brackets have their own explicit function.
What's been proven here without a doubt (as if it needed any proof) is that if we leave any room for misinterpretation in our expressions, they'll be misinterpreted by man & machine alike.
Happens in all fields not just mathematics.
reply to post by Arbitrageur
The general accepted rules of mathematics Multiplication, Division, addition and subtraction is that it occurs in that order. Therefore /2 operand takes place before 9+3.
9+3 is in parenthesis, which means you absolutely must do the addition first.
Or you can distribute out the 2 over the parenthesis and get
48 divided by (18+6) which still gives you 24 on the denominator, and two as the final answer.
There is no debate here. 2 is the correct answer. The only debate is by people who forgot how to properly do math, or by people who don't realize calculators aren't perfect and you must be liberal with parenthesis to get the correct answer.
what is 48/2(x+y)? i typically assume that 48 is being divided by 2(x+y). I guess it should be written like this 48/[2(x+y)].
Great way of looking at it.
That would be 48/2x+2y
Then you get 48/18+6 or 48/24 or TWO.
I can't believe some people still think it's anything other than two. Sad state of education for sure.
That is exactly what I said. The two is a common factor of the elements of the sum within the brackets and so expanding will give you (18+6) which as brackets are solved first gives a denominator of 24. I see no ambiguity here.
original postedit on 2-3-2014 by CthulhuMythos because: (no reason given)