D+3e=-7

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Solution for D+3e=-7 equation: 



+3D=-7

We move all terms to the left:

+3D-(-7)=0

We add all the numbers together, and all the variables

3D+7=0

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

3D=-7

D=-7/3

D=-2+1/3

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