-7+7d=9d-2+7

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Solution for -7+7d=9d-2+7 equation: 



-7+7d=9d-2+7

We move all terms to the left:

-7+7d-(9d-2+7)=0

We add all the numbers together, and all the variables

7d-(9d+5)-7=0

We get rid of parentheses

7d-9d-5-7=0

We add all the numbers together, and all the variables

-2d-12=0

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

-2d=12

d=12/-2

d=-6

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