3=d/7

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Solution for 3=d/7 equation: 



3=d/7

We move all terms to the left:

3-(d/7)=0

We add all the numbers together, and all the variables

-(+d/7)+3=0

We get rid of parentheses

-d/7+3=0

We multiply all the terms by the denominator


-d+3*7=0

We add all the numbers together, and all the variables

-1d+21=0

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

-d=-21

d=-21/-1

d=+21

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