3(d-7)=-6(d-1)

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Solution for 3(d-7)=-6(d-1) equation: 



3(d-7)=-6(d-1)

We move all terms to the left:

3(d-7)-(-6(d-1))=0

We multiply parentheses

3d-(-6(d-1))-21=0



We calculate terms in parentheses: -(-6(d-1)), so:

-6(d-1)

We multiply parentheses

-6d+6

Back to the equation:

-(-6d+6)



We get rid of parentheses

3d+6d-6-21=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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