7(d-84)=21

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Solution for 7(d-84)=21 equation: 



7(d-84)=21

We move all terms to the left:

7(d-84)-(21)=0

We multiply parentheses

7d-588-21=0

We add all the numbers together, and all the variables

7d-609=0

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

7d=609

d=609/7

d=87

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