-7d-4d+2d=40

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Solution for -7d-4d+2d=40 equation: 



-7d-4d+2d=40

We move all terms to the left:

-7d-4d+2d-(40)=0

We add all the numbers together, and all the variables

-9d-40=0

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

-9d=40

d=40/-9

d=-4+4/9

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