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x-x(0.20)=250
We move all terms to the left:
x-x(0.20)-(250)=0
We add all the numbers together, and all the variables
x-x(0.2)-250=0
We multiply parentheses
x-0.2x-250=0
We add all the numbers together, and all the variables
0.8x-250=0
We move all terms containing x to the left, all other terms to the right
0.8x=250
x=250/0.8
x=312+0.39999999999998/0.8
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