-21=7y+5-3y

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Solution for -21=7y+5-3y equation: 



-21=7y+5-3y

We move all terms to the left:

-21-(7y+5-3y)=0

We add all the numbers together, and all the variables

-(4y+5)-21=0

We get rid of parentheses

-4y-5-21=0

We add all the numbers together, and all the variables

-4y-26=0

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

-4y=26

y=26/-4

y=-6+1/2

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