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0.08d+2.50=3.06
We move all terms to the left:
0.08d+2.50-(3.06)=0
We add all the numbers together, and all the variables
0.08d-0.56=0
We move all terms containing d to the left, all other terms to the right
0.08d=0.56
d=0.56/0.08
d=7
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