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5+3.7=42.d
We move all terms to the left:
5+3.7-(42.d)=0
We add all the numbers together, and all the variables
-(+42.d)+5+3.7=0
We add all the numbers together, and all the variables
-(+42.d)+8.7=0
We get rid of parentheses
-42.d+8.7=0
We add all the numbers together, and all the variables
-42d+8.7=0
We move all terms containing d to the left, all other terms to the right
-42d=-8.7
d=-8.7/-42
d=3.2222222222222/15.555555555556
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