18=3(d-7)

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



18=3(d-7)

We move all terms to the left:

18-(3(d-7))=0



We calculate terms in parentheses: -(3(d-7)), so:

3(d-7)

We multiply parentheses

3d-21

Back to the equation:

-(3d-21)



We get rid of parentheses

-3d+21+18=0

We add all the numbers together, and all the variables

-3d+39=0

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

-3d=-39

d=-39/-3

d=+13

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