7y=9y-20

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Solution for 7y=9y-20 equation: 



7y=9y-20

We move all terms to the left:

7y-(9y-20)=0

We get rid of parentheses

7y-9y+20=0

We add all the numbers together, and all the variables

-2y+20=0

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

-2y=-20

y=-20/-2

y=+10

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