3(2d+1)=15

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Solution for 3(2d+1)=15 equation: 



3(2d+1)=15

We move all terms to the left:

3(2d+1)-(15)=0

We multiply parentheses

6d+3-15=0

We add all the numbers together, and all the variables

6d-12=0

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

6d=12

d=12/6

d=2

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