6(y+2)=3y+21

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Solution for 6(y+2)=3y+21 equation: 



6(y+2)=3y+21

We move all terms to the left:

6(y+2)-(3y+21)=0

We multiply parentheses

6y-(3y+21)+12=0

We get rid of parentheses

6y-3y-21+12=0

We add all the numbers together, and all the variables

3y-9=0

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

3y=9

y=9/3

y=3

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