3d+d-4d+d=15

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Solution for 3d+d-4d+d=15 equation: 



3d+d-4d+d=15

We move all terms to the left:

3d+d-4d+d-(15)=0

We add all the numbers together, and all the variables

d-15=0

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

d=15

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