0=-2(3y+21)

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Solution for 0=-2(3y+21) equation: 



0=-2(3y+21)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(-2(3y+21)), so:

-2(3y+21)

We multiply parentheses

-6y-42

Back to the equation:

-(-6y-42)



We get rid of parentheses

6y+42=0

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

6y=-42

y=-42/6

y=-7

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