3(y+2)-3(1-2y)=15y+21

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Solution for 3(y+2)-3(1-2y)=15y+21 equation: 



3(y+2)-3(1-2y)=15y+21

We move all terms to the left:

3(y+2)-3(1-2y)-(15y+21)=0

We add all the numbers together, and all the variables

3(y+2)-3(-2y+1)-(15y+21)=0

We multiply parentheses

3y+6y-(15y+21)+6-3=0

We get rid of parentheses

3y+6y-15y-21+6-3=0

We add all the numbers together, and all the variables

-6y-18=0

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

-6y=18

y=18/-6

y=-3

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