7d-4+d=12+5d+5

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Solution for 7d-4+d=12+5d+5 equation:



7d-4+d=12+5d+5
We move all terms to the left:
7d-4+d-(12+5d+5)=0
We add all the numbers together, and all the variables
7d+d-(5d+17)-4=0
We add all the numbers together, and all the variables
8d-(5d+17)-4=0
We get rid of parentheses
8d-5d-17-4=0
We add all the numbers together, and all the variables
3d-21=0
We move all terms containing d to the left, all other terms to the right
3d=21
d=21/3
d=7

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