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8.4d+9.93+3.8d=-9.39+9.9d
We move all terms to the left:
8.4d+9.93+3.8d-(-9.39+9.9d)=0
We add all the numbers together, and all the variables
8.4d+3.8d-(9.9d-9.39)+9.93=0
We add all the numbers together, and all the variables
12.2d-(9.9d-9.39)+9.93=0
We get rid of parentheses
12.2d-9.9d+9.39+9.93=0
We add all the numbers together, and all the variables
2.3d+19.32=0
We move all terms containing d to the left, all other terms to the right
2.3d=-19.32
d=-19.32/2.3
d=-8+0.92/2.3
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