-7-2d=d+8

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Solution for -7-2d=d+8 equation: 



-7-2d=d+8

We move all terms to the left:

-7-2d-(d+8)=0

We get rid of parentheses

-2d-d-8-7=0

We add all the numbers together, and all the variables

-3d-15=0

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

-3d=15

d=15/-3

d=-5

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