Y-12=2x+21

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Solution for Y-12=2x+21 equation: 



-12=2Y+21

We move all terms to the left:

-12-(2Y+21)=0

We get rid of parentheses

-2Y-21-12=0

We add all the numbers together, and all the variables

-2Y-33=0

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

-2Y=33

Y=33/-2

Y=-16+1/2

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