Y=3x^+18x-21

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Solution for Y=3x^+18x-21 equation: 



=3Y^+18Y-21

We move all terms to the left:

-(3Y^+18Y-21)=0

We get rid of parentheses

-3Y^-18Y+21=0

We add all the numbers together, and all the variables

-21Y+21=0

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

-21Y=-21

Y=-21/-21

Y=1

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