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7.5-3.3=10.4-6.6d
We move all terms to the left:
7.5-3.3-(10.4-6.6d)=0
We add all the numbers together, and all the variables
-(-6.6d+10.4)+7.5-3.3=0
We add all the numbers together, and all the variables
-(-6.6d+10.4)+4.2=0
We get rid of parentheses
6.6d-10.4+4.2=0
We add all the numbers together, and all the variables
6.6d-6.2=0
We move all terms containing d to the left, all other terms to the right
6.6d=6.2
d=6.2/6.6
d=1/1.06451612903
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