7y+21=-y-(2y-23)

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Solution for 7y+21=-y-(2y-23) equation: 



7y+21=-y-(2y-23)

We move all terms to the left:

7y+21-(-y-(2y-23))=0



We calculate terms in parentheses: -(-y-(2y-23)), so:

-y-(2y-23)

We add all the numbers together, and all the variables

-1y-(2y-23)

We get rid of parentheses

-1y-2y+23

We add all the numbers together, and all the variables

-3y+23

Back to the equation:

-(-3y+23)



We get rid of parentheses

7y+3y-23+21=0

We add all the numbers together, and all the variables

10y-2=0

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

10y=2

y=2/10

y=1/5

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