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-8.4d+12.6+17.4d=-7.29+7.3d
We move all terms to the left:
-8.4d+12.6+17.4d-(-7.29+7.3d)=0
We add all the numbers together, and all the variables
-8.4d+17.4d-(7.3d-7.29)+12.6=0
We add all the numbers together, and all the variables
9d-(7.3d-7.29)+12.6=0
We get rid of parentheses
9d-7.3d+7.29+12.6=0
We add all the numbers together, and all the variables
1.7d+19.89=0
We move all terms containing d to the left, all other terms to the right
1.7d=-19.89
d=-19.89/1.7
d=-11+1/1.4285714285714
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