-3(d/2+6)=30

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Solution for -3(d/2+6)=30 equation: 



-3(d/2+6)=30

We move all terms to the left:

-3(d/2+6)-(30)=0

We multiply parentheses

-3d-18-30=0

We add all the numbers together, and all the variables

-3d-48=0

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

-3d=48

d=48/-3

d=-16

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