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75.4=-5.8d
We move all terms to the left:
75.4-(-5.8d)=0
We get rid of parentheses
5.8d+75.4=0
We move all terms containing d to the left, all other terms to the right
5.8d=-75.4
d=-75.4/5.8
d=-13+1.42108547152E-14/5.8
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