12d+6=3d+69

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Solution for 12d+6=3d+69 equation: 



12d+6=3d+69

We move all terms to the left:

12d+6-(3d+69)=0

We get rid of parentheses

12d-3d-69+6=0

We add all the numbers together, and all the variables

9d-63=0

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

9d=63

d=63/9

d=7

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