7s+9=-7+3s

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



7s+9=-7+3s

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

7s-3s+7+9=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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