12-4s=-s

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Solution for 12-4s=-s equation: 



12-4s=-s

We move all terms to the left:

12-4s-(-s)=0

We add all the numbers together, and all the variables

-4s-(-1s)+12=0

We get rid of parentheses

-4s+1s+12=0

We add all the numbers together, and all the variables

-3s+12=0

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

-3s=-12

s=-12/-3

s=+4

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