D-3=c-7

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Solution for D-3=c-7 equation: 



-3=D-7

We move all terms to the left:

-3-(D-7)=0

We get rid of parentheses

-D+7-3=0

We add all the numbers together, and all the variables

-1D+4=0

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

-D=-4

D=-4/-1

D=+4

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