(-3)=8s+21

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Solution for (-3)=8s+21 equation: 



(-3)=8s+21

We move all terms to the left:

(-3)-(8s+21)=0

We add all the numbers together, and all the variables

-(8s+21)-3=0

We get rid of parentheses

-8s-21-3=0

We add all the numbers together, and all the variables

-8s-24=0

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

-8s=24

s=24/-8

s=-3

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