-8d-7=9d-7

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Solution for -8d-7=9d-7 equation: 



-8d-7=9d-7

We move all terms to the left:

-8d-7-(9d-7)=0

We get rid of parentheses

-8d-9d+7-7=0

We add all the numbers together, and all the variables

-17d=0

d=0/-17

d=0

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