3(y+9)=21

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Solution for 3(y+9)=21 equation: 



3(y+9)=21

We move all terms to the left:

3(y+9)-(21)=0

We multiply parentheses

3y+27-21=0

We add all the numbers together, and all the variables

3y+6=0

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

3y=-6

y=-6/3

y=-2

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