7d=70-3d

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Solution for 7d=70-3d equation: 



7d=70-3d

We move all terms to the left:

7d-(70-3d)=0

We add all the numbers together, and all the variables

7d-(-3d+70)=0

We get rid of parentheses

7d+3d-70=0

We add all the numbers together, and all the variables

10d-70=0

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

10d=70

d=70/10

d=7

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