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6.1d=42.7
We move all terms to the left:
6.1d-(42.7)=0
We add all the numbers together, and all the variables
6.1d-42.7=0
We move all terms containing d to the left, all other terms to the right
6.1d=42.7
d=42.7/6.1
d=7+7.1054273576E-15/6.1
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