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x(1-0.15)=1000
We move all terms to the left:
x(1-0.15)-(1000)=0
We add all the numbers together, and all the variables
x(0.85)-1000=0
We multiply parentheses
0.85x-1000=0
We move all terms containing x to the left, all other terms to the right
0.85x=1000
x=1000/0.85
x=1176+0.4/0.85
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