18=s/21

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Solution for 18=s/21 equation: 



18=s/21

We move all terms to the left:

18-(s/21)=0

We add all the numbers together, and all the variables

-(+s/21)+18=0

We get rid of parentheses

-s/21+18=0

We multiply all the terms by the denominator


-s+18*21=0

We add all the numbers together, and all the variables

-1s+378=0

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

-s=-378

s=-378/-1

s=+378

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