20=y(-4)

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Solution for 20=y(-4) equation: 



20=y(-4)

We move all terms to the left:

20-(y(-4))=0



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

y(-4)

We multiply parentheses

-4y

Back to the equation:

-(-4y)



We get rid of parentheses

4y+20=0

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

4y=-20

y=-20/4

y=-5

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