7y-20=7-2y

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Solution for 7y-20=7-2y equation: 



7y-20=7-2y

We move all terms to the left:

7y-20-(7-2y)=0

We add all the numbers together, and all the variables

7y-(-2y+7)-20=0

We get rid of parentheses

7y+2y-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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