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8d+19.3d+18.45=-19.55+19.7d
We move all terms to the left:
8d+19.3d+18.45-(-19.55+19.7d)=0
We add all the numbers together, and all the variables
8d+19.3d-(19.7d-19.55)+18.45=0
We add all the numbers together, and all the variables
27.3d-(19.7d-19.55)+18.45=0
We get rid of parentheses
27.3d-19.7d+19.55+18.45=0
We add all the numbers together, and all the variables
7.6d+38=0
We move all terms containing d to the left, all other terms to the right
7.6d=-38
d=-38/7.6
d=-5
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