21=y/18

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Solution for 21=y/18 equation: 



21=y/18

We move all terms to the left:

21-(y/18)=0

We add all the numbers together, and all the variables

-(+y/18)+21=0

We get rid of parentheses

-y/18+21=0

We multiply all the terms by the denominator


-y+21*18=0

We add all the numbers together, and all the variables

-1y+378=0

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

-y=-378

y=-378/-1

y=+378

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