3(s-4)=21

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Solution for 3(s-4)=21 equation: 



3(s-4)=21

We move all terms to the left:

3(s-4)-(21)=0

We multiply parentheses

3s-12-21=0

We add all the numbers together, and all the variables

3s-33=0

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

3s=33

s=33/3

s=11

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