Please help!!!! Foundations of Gmat Math

[CarlinS407]

HI,

Thanks in advance for your help.

On the Foundations of GMAT MATH BOOK - Equations

Page #279

Equation y-x=4... was multiplied by -1 so it can be expressed x follow by y ... The result was -x+y= -4 ( To me this is the correct way)

But I noticed that on pag 276, equation y-x= -7
They didn't apply the -1 to ( -7) Result on the book was -x+7=-7

The same thing happened on pag # 262 problem # 8, answer on pag 284, Equation y-x= -5 Result -x+y= -5

They didn't apply the -1 to (-5)

Why is that?

[RonPurewal]

Hi,
Wrong folder for this problem.

Problems from the MGMAT books belong in the MGMAT non-CAT folder.

Please re-post your question in the correct folder. Thanks.