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-2(d+3)-5d=-34
We move all terms to the left:
-2(d+3)-5d-(-34)=0
We add all the numbers together, and all the variables
-5d-2(d+3)+34=0
We multiply parentheses
-5d-2d-6+34=0
We add all the numbers together, and all the variables
-7d+28=0
We move all terms containing d to the left, all other terms to the right
-7d=-28
d=-28/-7
d=+4
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