-7s+7=-9-3s

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Solution for -7s+7=-9-3s equation: 



-7s+7=-9-3s

We move all terms to the left:

-7s+7-(-9-3s)=0

We add all the numbers together, and all the variables

-7s-(-3s-9)+7=0

We get rid of parentheses

-7s+3s+9+7=0

We add all the numbers together, and all the variables

-4s+16=0

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

-4s=-16

s=-16/-4

s=+4

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