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x-0.15x=233.75
We move all terms to the left:
x-0.15x-(233.75)=0
We add all the numbers together, and all the variables
0.85x-233.75=0
We move all terms containing x to the left, all other terms to the right
0.85x=233.75
x=233.75/0.85
x=275
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