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x-0.20x=393.600
We move all terms to the left:
x-0.20x-(393.600)=0
We add all the numbers together, and all the variables
x-0.20x-(393.6)=0
We add all the numbers together, and all the variables
0.8x-393.6=0
We move all terms containing x to the left, all other terms to the right
0.8x=393.6
x=393.6/0.8
x=492
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