-7d+2d=15

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Solution for -7d+2d=15 equation: 



-7d+2d=15

We move all terms to the left:

-7d+2d-(15)=0

We add all the numbers together, and all the variables

-5d-15=0

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

-5d=15

d=15/-5

d=-3

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