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?

maths - bindiya farswani, Saturday, January 30, 2010 at 3:49am
Sorry! I got it now! I was solving it the wrong way! silly me! :p:) Sorry to bother you!
maths - drwls, Saturday, January 30, 2010 at 6:27am
Nice work! Both of your solutions are correct. Thanks for rechecking (and doing) your own work! It makes our job easier.

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