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28.7d+16.2+15.4=82
We move all terms to the left:
28.7d+16.2+15.4-(82)=0
We add all the numbers together, and all the variables
28.7d-50.4=0
We move all terms containing d to the left, all other terms to the right
28.7d=50.4
d=50.4/28.7
d=1+2.81818181818/3.72727272727
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