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d/2=5.4
We move all terms to the left:
d/2-(5.4)=0
We add all the numbers together, and all the variables
d/2-5.4=0
We multiply all the terms by the denominator
d-(5.4)*2=0
We add all the numbers together, and all the variables
d-10.8=0
We move all terms containing d to the left, all other terms to the right
d=10.8
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