7+s-9s=-7s+4

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Solution for 7+s-9s=-7s+4 equation: 



7+s-9s=-7s+4

We move all terms to the left:

7+s-9s-(-7s+4)=0

We add all the numbers together, and all the variables

-8s-(-7s+4)+7=0

We get rid of parentheses

-8s+7s-4+7=0

We add all the numbers together, and all the variables

-1s+3=0

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

-s=-3

s=-3/-1

s=+3

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