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d+85/(-2)=-3
We move all terms to the left:
d+85/(-2)-(-3)=0
We add all the numbers together, and all the variables
d+3+85/(-2)=0
We multiply all the terms by the denominator
d*(-2)+85+3*(-2)=0
We add all the numbers together, and all the variables
d*(-2)+79=0
We multiply parentheses
-2d+79=0
We move all terms containing d to the left, all other terms to the right
-2d=-79
d=-79/-2
d=39+1/2
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