8=-8(d+9)

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Solution for 8=-8(d+9) equation: 



8=-8(d+9)

We move all terms to the left:

8-(-8(d+9))=0



We calculate terms in parentheses: -(-8(d+9)), so:

-8(d+9)

We multiply parentheses

-8d-72

Back to the equation:

-(-8d-72)



We get rid of parentheses

8d+72+8=0

We add all the numbers together, and all the variables

8d+80=0

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

8d=-80

d=-80/8

d=-10

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