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April 19, 2014

Homework Help: Math

Posted by Nicci on Friday, September 2, 2011 at 10:23pm.

Hi I wanted some help with this question, I don't want the answer though as I want to try to see where my workings are going wrong.

3 x 34 / 9 - 2 (10 - 6) - 4 / 2

A -13
B 5
C 6
D -14

But I'm getting -3. Here's how I work through the equation using PEMDAS as a guide to order:

3 x 45 / 9 - 2 (10-6) - 4 / 2
= 3 x 45 / 9 - 2 (4) - 4 / 2
= 135 / 9 - 2 (4) - 4 / 2
= 15 - 2(4) - 4 / 2
= 15 - 16 - 4 / 2
= 15 - 16 - 2
= -3

please can someone tell me where I'm going wrong?

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