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September 18, 2014

Homework Help: maths

Posted by bindiya farswani on Saturday, January 30, 2010 at 3:09am.

I've to solve the following absolute value equation 8|w-7|=72.
I solved the equation and the answers I got were -2 and 16. However the problem is that when I'm checking the equation with the answers it's not coming right.

I.E.
8|16-7|=72
8|9| = 72
8(9)= 72
72 = 72 (which is right)

8|-2-7|=-72
8|-9| = -72
8 (9) = - 72
72 = -72 (its coming wrong)
Thus is the second equation right and am I solving it in the right way?

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