-3(s-4)=-9

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Solution for -3(s-4)=-9 equation: 



-3(s-4)=-9

We move all terms to the left:

-3(s-4)-(-9)=0

We add all the numbers together, and all the variables

-3(s-4)+9=0

We multiply parentheses

-3s+12+9=0

We add all the numbers together, and all the variables

-3s+21=0

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

-3s=-21

s=-21/-3

s=+7

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