-15=s/21

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Solution for -15=s/21 equation: 



-15=s/21

We move all terms to the left:

-15-(s/21)=0

We add all the numbers together, and all the variables

-(+s/21)-15=0

We get rid of parentheses

-s/21-15=0

We multiply all the terms by the denominator


-s-15*21=0

We add all the numbers together, and all the variables

-1s-315=0

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

-s=315

s=315/-1

s=-315

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