y=-4(y-1)=21

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Solution for y=-4(y-1)=21 equation: 



y=-4(y-1)=21

We move all terms to the left:

y-(-4(y-1))=0



We calculate terms in parentheses: -(-4(y-1)), so:

-4(y-1)

We multiply parentheses

-4y+4

Back to the equation:

-(-4y+4)



We get rid of parentheses

y+4y-4=0

We add all the numbers together, and all the variables

5y-4=0

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

5y=4

y=4/5

y=4/5

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