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-2.5d-3.2=64.1
We move all terms to the left:
-2.5d-3.2-(64.1)=0
We add all the numbers together, and all the variables
-2.5d-67.3=0
We move all terms containing d to the left, all other terms to the right
-2.5d=67.3
d=67.3/-2.5
d=-26+1/1.0869565217391
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