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D( x )
101-(100*x) = 0
101-(100*x) = 0
101-(100*x) = 0
101-100*x = 0
101-100*x = 0 // - 101
-100*x = -101 // : -100
x = -101/(-100)
x = 101/100
x in (-oo:101/100) U (101/100:+oo)
(1500000*x)/(101-(100*x)) = 15300 // - 15300
(1500000*x)/(101-(100*x))-15300 = 0
(1500000*x)/(101-100*x)-15300 = 0
(1500000*x)/(101-100*x)+(-15300*(101-100*x))/(101-100*x) = 0
1500000*x-15300*(101-100*x) = 0
3030000*x-1545300 = 0
(3030000*x-1545300)/(101-100*x) = 0
(3030000*x-1545300)/(101-100*x) = 0 // * 101-100*x
3030000*x-1545300 = 0
3030000*x-1545300 = 0 // + 1545300
3030000*x = 1545300 // : 3030000
x = 1545300/3030000
x = 51/100
x = 51/100
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