3(y-7)=45

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Solution for 3(y-7)=45 equation: 



3(y-7)=45

We move all terms to the left:

3(y-7)-(45)=0

We multiply parentheses

3y-21-45=0

We add all the numbers together, and all the variables

3y-66=0

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

3y=66

y=66/3

y=22

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