12-3s=9

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Solution for 12-3s=9 equation: 



12-3s=9

We move all terms to the left:

12-3s-(9)=0

We add all the numbers together, and all the variables

-3s+3=0

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

-3s=-3

s=-3/-3

s=1

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