2d-31=31

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Solution for 2d-31=31 equation: 



2d-31=31

We move all terms to the left:

2d-31-(31)=0

We add all the numbers together, and all the variables

2d-62=0

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

2d=62

d=62/2

d=31

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