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30.42=55.d
We move all terms to the left:
30.42-(55.d)=0
We add all the numbers together, and all the variables
-(+55.d)+30.42=0
We get rid of parentheses
-55.d+30.42=0
We add all the numbers together, and all the variables
-55d+30.42=0
We move all terms containing d to the left, all other terms to the right
-55d=-30.42
d=-30.42/-55
d=5.6125461254613/10.147601476015
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