23=2+7d

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Solution for 23=2+7d equation: 



23=2+7d

We move all terms to the left:

23-(2+7d)=0

We add all the numbers together, and all the variables

-(7d+2)+23=0

We get rid of parentheses

-7d-2+23=0

We add all the numbers together, and all the variables

-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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