Y-3(2y+3)=21

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Solution for Y-3(2y+3)=21 equation: 



-3(2Y+3)=21

We move all terms to the left:

-3(2Y+3)-(21)=0

We multiply parentheses

-6Y-9-21=0

We add all the numbers together, and all the variables

-6Y-30=0

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

-6Y=30

Y=30/-6

Y=-5

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