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45.0d-1.99=68.8
We move all terms to the left:
45.0d-1.99-(68.8)=0
We add all the numbers together, and all the variables
45.0d-70.79=0
We move all terms containing d to the left, all other terms to the right
45.0d=70.79
d=70.79/45.0
d=1+4.454231433506/7.7720207253886
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