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(70*((60*(x-((2*x)/100)))/100))/100 = 7203 // - 7203
(70*((60*(x-((2*x)/100)))/100))/100-7203 = 0
(70*((60*(x+(-1/50)*x))/100))/100-7203 = 0
(49/50*60*70*x)/(100^2)-7203 = 0
(49/50*60*70*x)/(100^2)+(-7203*100^2)/(100^2) = 0
49/50*60*70*x-7203*100^2 = 0
4116*x-72030000 = 0
(4116*x-72030000)/(100^2) = 0
(4116*x-72030000)/(100^2) = 0 // * 10000
4116*x-72030000 = 0
4116*x-72030000 = 0 // + 72030000
4116*x = 72030000 // : 4116
x = 72030000/4116
x = 17500
x = 17500
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