7=d+4

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Solution for 7=d+4 equation: 



7=d+4

We move all terms to the left:

7-(d+4)=0

We get rid of parentheses

-d-4+7=0

We add all the numbers together, and all the variables

-1d+3=0

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

-d=-3

d=-3/-1

d=+3

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