7y-1=4y+20

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Solution for 7y-1=4y+20 equation: 



7y-1=4y+20

We move all terms to the left:

7y-1-(4y+20)=0

We get rid of parentheses

7y-4y-20-1=0

We add all the numbers together, and all the variables

3y-21=0

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

3y=21

y=21/3

y=7

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