13d+15=10d-12

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Solution for 13d+15=10d-12 equation: 



13d+15=10d-12

We move all terms to the left:

13d+15-(10d-12)=0

We get rid of parentheses

13d-10d+12+15=0

We add all the numbers together, and all the variables

3d+27=0

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

3d=-27

d=-27/3

d=-9

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