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x-(0.15x)=100
We move all terms to the left:
x-(0.15x)-(100)=0
We add all the numbers together, and all the variables
x-(+0.15x)-100=0
We get rid of parentheses
x-0.15x-100=0
We add all the numbers together, and all the variables
0.85x-100=0
We move all terms containing x to the left, all other terms to the right
0.85x=100
x=100/0.85
x=117+0.55/0.85
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