20=t(-4)

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Solution for 20=t(-4) equation: 



20=t(-4)

We move all terms to the left:

20-(t(-4))=0



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

t(-4)

We multiply parentheses

-4t

Back to the equation:

-(-4t)



We get rid of parentheses

4t+20=0

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

4t=-20

t=-20/4

t=-5

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