9(y-1)=5y-21

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Solution for 9(y-1)=5y-21 equation: 



9(y-1)=5y-21

We move all terms to the left:

9(y-1)-(5y-21)=0

We multiply parentheses

9y-(5y-21)-9=0

We get rid of parentheses

9y-5y+21-9=0

We add all the numbers together, and all the variables

4y+12=0

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

4y=-12

y=-12/4

y=-3

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