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7.5=d/45
We move all terms to the left:
7.5-(d/45)=0
We add all the numbers together, and all the variables
-(+d/45)+7.5=0
We get rid of parentheses
-d/45+7.5=0
We multiply all the terms by the denominator
-d+(7.5)*45=0
We add all the numbers together, and all the variables
-1d+337.5=0
We move all terms containing d to the left, all other terms to the right
-d=-337.5
d=-337.5/-1
d=337+0.5/1
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