7d+2(d-6)+3=18

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Solution for 7d+2(d-6)+3=18 equation: 



7d+2(d-6)+3=18

We move all terms to the left:

7d+2(d-6)+3-(18)=0

We add all the numbers together, and all the variables

7d+2(d-6)-15=0

We multiply parentheses

7d+2d-12-15=0

We add all the numbers together, and all the variables

9d-27=0

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

9d=27

d=27/9

d=3

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