2(-y+7)+3y=21

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Solution for 2(-y+7)+3y=21 equation: 



2(-y+7)+3y=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

2(-1y+7)+3y-21=0

We add all the numbers together, and all the variables

3y+2(-1y+7)-21=0

We multiply parentheses

3y-2y+14-21=0

We add all the numbers together, and all the variables

y-7=0

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

y=7

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