18=3s+12

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Solution for 18=3s+12 equation: 



18=3s+12

We move all terms to the left:

18-(3s+12)=0

We get rid of parentheses

-3s-12+18=0

We add all the numbers together, and all the variables

-3s+6=0

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

-3s=-6

s=-6/-3

s=+2

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