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November 28, 2015
Posted by **Shalea** on Tuesday, June 8, 2010 at 12:27am.

- math -
**troy**, Tuesday, June 8, 2010 at 12:58am18=6-y

Subtract 6 from both sides you get

12=-y

since your "y" cannot be negative your going to divide by -1 on both sides.

you then have

-12=y

if you were to check this, this is how it would look

18=6-(-12)

18=6+12

18=18