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d-10-2d+7=8d-10-3d
We move all terms to the left:
d-10-2d+7-(8d-10-3d)=0
We add all the numbers together, and all the variables
d-2d-(5d-10)-10+7=0
We add all the numbers together, and all the variables
-1d-(5d-10)-3=0
We get rid of parentheses
-1d-5d+10-3=0
We add all the numbers together, and all the variables
-6d+7=0
We move all terms containing d to the left, all other terms to the right
-6d=-7
d=-7/-6
d=1+1/6
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