-3(11-s)=21

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Solution for -3(11-s)=21 equation: 



-3(11-s)=21

We move all terms to the left:

-3(11-s)-(21)=0

We add all the numbers together, and all the variables

-3(-1s+11)-21=0

We multiply parentheses

3s-33-21=0

We add all the numbers together, and all the variables

3s-54=0

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

3s=54

s=54/3

s=18

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