3y+(21-1y)=21+2y

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Solution for 3y+(21-1y)=21+2y equation: 



3y+(21-1y)=21+2y

We move all terms to the left:

3y+(21-1y)-(21+2y)=0

We add all the numbers together, and all the variables

3y+(-1y+21)-(2y+21)=0

We get rid of parentheses

3y-1y-2y+21-21=0

We add all the numbers together, and all the variables

=0

y=0/1

y=0

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