20=9y-7

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Solution for 20=9y-7 equation: 



20=9y-7

We move all terms to the left:

20-(9y-7)=0

We get rid of parentheses

-9y+7+20=0

We add all the numbers together, and all the variables

-9y+27=0

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

-9y=-27

y=-27/-9

y=+3

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