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x+x(0.13)=335
We move all terms to the left:
x+x(0.13)-(335)=0
We multiply parentheses
x+0.13x-335=0
We add all the numbers together, and all the variables
1.13x-335=0
We move all terms containing x to the left, all other terms to the right
1.13x=335
x=335/1.13
x=296+0.52/1.13
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