3(7y+9)=7y-15

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Solution for 3(7y+9)=7y-15 equation: 



3(7y+9)=7y-15

We move all terms to the left:

3(7y+9)-(7y-15)=0

We multiply parentheses

21y-(7y-15)+27=0

We get rid of parentheses

21y-7y+15+27=0

We add all the numbers together, and all the variables

14y+42=0

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

14y=-42

y=-42/14

y=-3

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