7d-12d+3d=15

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Solution for 7d-12d+3d=15 equation: 



7d-12d+3d=15

We move all terms to the left:

7d-12d+3d-(15)=0

We add all the numbers together, and all the variables

-2d-15=0

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

-2d=15

d=15/-2

d=-7+1/2

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