2y-(7-5y-21)=0

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Solution for 2y-(7-5y-21)=0 equation: 



2y-(7-5y-21)=0

We add all the numbers together, and all the variables

2y-(-5y-14)=0

We get rid of parentheses

2y+5y+14=0

We add all the numbers together, and all the variables

7y+14=0

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

7y=-14

y=-14/7

y=-2

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