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0.25d-7.4=8.2
We move all terms to the left:
0.25d-7.4-(8.2)=0
We add all the numbers together, and all the variables
0.25d-15.6=0
We move all terms containing d to the left, all other terms to the right
0.25d=15.6
d=15.6/0.25
d=62+0.1/0.25
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