-12=7-s

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Solution for -12=7-s equation: 



-12=7-s

We move all terms to the left:

-12-(7-s)=0

We add all the numbers together, and all the variables

-(-1s+7)-12=0

We get rid of parentheses

1s-7-12=0

We add all the numbers together, and all the variables

s-19=0

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

s=19

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