-9y=-4(y-5)

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Solution for -9y=-4(y-5) equation: 



-9y=-4(y-5)

We move all terms to the left:

-9y-(-4(y-5))=0



We calculate terms in parentheses: -(-4(y-5)), so:

-4(y-5)

We multiply parentheses

-4y+20

Back to the equation:

-(-4y+20)



We get rid of parentheses

-9y+4y-20=0

We add all the numbers together, and all the variables

-5y-20=0

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

-5y=20

y=20/-5

y=-4

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