-12d+15d=-18

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Solution for -12d+15d=-18 equation: 



-12d+15d=-18

We move all terms to the left:

-12d+15d-(-18)=0

We add all the numbers together, and all the variables

3d+18=0

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

3d=-18

d=-18/3

d=-6

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