-7w-8=-9w

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Solution for -7w-8=-9w equation: 



-7w-8=-9w

We move all terms to the left:

-7w-8-(-9w)=0

We get rid of parentheses

-7w+9w-8=0

We add all the numbers together, and all the variables

2w-8=0

We move all terms containing w to the left, all other terms to the right

2w=8

w=8/2

w=4

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