7=3+2d

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Solution for 7=3+2d equation: 



7=3+2d

We move all terms to the left:

7-(3+2d)=0

We add all the numbers together, and all the variables

-(2d+3)+7=0

We get rid of parentheses

-2d-3+7=0

We add all the numbers together, and all the variables

-2d+4=0

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

-2d=-4

d=-4/-2

d=+2

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