8-7s=-9s

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



8-7s=-9s

We move all terms to the left:

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

We get rid of parentheses

-7s+9s+8=0

We add all the numbers together, and all the variables

2s+8=0

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

2s=-8

s=-8/2

s=-4

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