30=8+7d

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Solution for 30=8+7d equation: 



30=8+7d

We move all terms to the left:

30-(8+7d)=0

We add all the numbers together, and all the variables

-(7d+8)+30=0

We get rid of parentheses

-7d-8+30=0

We add all the numbers together, and all the variables

-7d+22=0

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

-7d=-22

d=-22/-7

d=3+1/7

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