Y=21x-81

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Solution for Y=21x-81 equation: 



=21Y-81

We move all terms to the left:

-(21Y-81)=0

We get rid of parentheses

-21Y+81=0

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

-21Y=-81

Y=-81/-21

Y=3+6/7

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