0=7(d-3)

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Solution for 0=7(d-3) equation: 



0=7(d-3)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(7(d-3))=0



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

7(d-3)

We multiply parentheses

7d-21

Back to the equation:

-(7d-21)



We get rid of parentheses

-7d+21=0

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

-7d=-21

d=-21/-7

d=+3

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