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D( x )
2*x-17 = 0
2*x-17 = 0
2*x-17 = 0
2*x-17 = 0 // + 17
2*x = 17 // : 2
x = 17/2
x in (-oo:17/2) U (17/2:+oo)
(8*x)/(2*x-17) = 8 // - 8
(8*x)/(2*x-17)-8 = 0
(8*x)/(2*x-17)+(-8*(2*x-17))/(2*x-17) = 0
8*x-8*(2*x-17) = 0
136-8*x = 0
(136-8*x)/(2*x-17) = 0
(136-8*x)/(2*x-17) = 0 // * 2*x-17
136-8*x = 0
136-8*x = 0 // - 136
-8*x = -136 // : -8
x = -136/(-8)
x = 17
x = 17
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