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d/12.1=4.3
We move all terms to the left:
d/12.1-(4.3)=0
We add all the numbers together, and all the variables
d/12.1-4.3=0
We multiply all the terms by the denominator
d-(4.3)*12.1=0
We add all the numbers together, and all the variables
d-52.03=0
We move all terms containing d to the left, all other terms to the right
d=52.03
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