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

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



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

We move all terms to the left:

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



We calculate terms in parentheses: -(-2(5y-2)), so:

-2(5y-2)

We multiply parentheses

-10y+4

Back to the equation:

-(-10y+4)



We get rid of parentheses

7y+10y-4+21=0

We add all the numbers together, and all the variables

17y+17=0

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

17y=-17

y=-17/17

y=-1

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