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x+x(1-0.85)=368
We move all terms to the left:
x+x(1-0.85)-(368)=0
We add all the numbers together, and all the variables
x+x(0.15)-368=0
We multiply parentheses
x+0.15x-368=0
We add all the numbers together, and all the variables
1.15x-368=0
We move all terms containing x to the left, all other terms to the right
1.15x=368
x=368/1.15
x=320
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