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0.89d+10=0.99
We move all terms to the left:
0.89d+10-(0.99)=0
We add all the numbers together, and all the variables
0.89d+9.01=0
We move all terms containing d to the left, all other terms to the right
0.89d=-9.01
d=-9.01/0.89
d=-10+0.11/0.89
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