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d+261.9=48.0
We move all terms to the left:
d+261.9-(48.0)=0
We add all the numbers together, and all the variables
d+261.9-48=0
We add all the numbers together, and all the variables
d+213.9=0
We move all terms containing d to the left, all other terms to the right
d=-213.9
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