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2.15d+3.12=527
We move all terms to the left:
2.15d+3.12-(527)=0
We add all the numbers together, and all the variables
2.15d-523.88=0
We move all terms containing d to the left, all other terms to the right
2.15d=523.88
d=523.88/2.15
d=243+1/1.5034965034964
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