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.6(37d)=77.7
We move all terms to the left:
.6(37d)-(77.7)=0
We add all the numbers together, and all the variables
.637d-77.7=0
We move all terms containing d to the left, all other terms to the right
.637d=77.7
d=77.7/.637
d=121+0.623/.637
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