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d+5.20=2.40
We move all terms to the left:
d+5.20-(2.40)=0
We add all the numbers together, and all the variables
d+5.20-(2.4)=0
We add all the numbers together, and all the variables
d+2.8=0
We move all terms containing d to the left, all other terms to the right
d=-2.8
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