2.5=d(-20)

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Solution for 2.5=d(-20) equation: 



2.5=d(-20)

We move all terms to the left:

2.5-(d(-20))=0



We calculate terms in parentheses: -(d(-20)), so:

d(-20)

We multiply parentheses

-20d

Back to the equation:

-(-20d)



We get rid of parentheses

20d+2.5=0

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

20d=-2.5

d=-2.5/20

d=-1/8

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