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40x+16.5x=378.55
We move all terms to the left:
40x+16.5x-(378.55)=0
We add all the numbers together, and all the variables
56.5x-378.55=0
We move all terms containing x to the left, all other terms to the right
56.5x=378.55
x=378.55/56.5
x=6+25.516129032258/36.451612903226
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