2(d+1)=3+7

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Solution for 2(d+1)=3+7 equation: 



2(d+1)=3+7

We move all terms to the left:

2(d+1)-(3+7)=0

We add all the numbers together, and all the variables

2(d+1)-10=0

We multiply parentheses

2d+2-10=0

We add all the numbers together, and all the variables

2d-8=0

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

2d=8

d=8/2

d=4

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