3(2y-3)=21

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Solution for 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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