d+8=-7d

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Solution for d+8=-7d equation: 



d+8=-7d

We move all terms to the left:

d+8-(-7d)=0

We get rid of parentheses

d+7d+8=0

We add all the numbers together, and all the variables

8d+8=0

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

8d=-8

d=-8/8

d=-1

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