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12.50x+7.50=50
We move all terms to the left:
12.50x+7.50-(50)=0
We add all the numbers together, and all the variables
12.50x-42.5=0
We move all terms containing x to the left, all other terms to the right
12.50x=42.5
x=42.5/12.50
x=3+5/12.50
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