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x-x(0.20)=450
We move all terms to the left:
x-x(0.20)-(450)=0
We add all the numbers together, and all the variables
x-x(0.2)-450=0
We multiply parentheses
x-0.2x-450=0
We add all the numbers together, and all the variables
0.8x-450=0
We move all terms containing x to the left, all other terms to the right
0.8x=450
x=450/0.8
x=562+0.39999999999998/0.8
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