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-9.8d+3.02+9.9d=-10.4d-12.03
We move all terms to the left:
-9.8d+3.02+9.9d-(-10.4d-12.03)=0
We add all the numbers together, and all the variables
0.1d-(-10.4d-12.03)+3.02=0
We get rid of parentheses
0.1d+10.4d+12.03+3.02=0
We add all the numbers together, and all the variables
10.5d+15.05=0
We move all terms containing d to the left, all other terms to the right
10.5d=-15.05
d=-15.05/10.5
d=-1+1.7843137254902/4.1176470588235
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