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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1-((x-5840)/x) = 0.22 // - 0.22
1-((x-5840)/x)-0.22 = 0
(-1*(x-5840))/x-0.22+1 = 0
(-1*(x-5840))/x+(-0.22*x)/x+(1*x)/x = 0
1*x-1*(x-5840)-0.22*x = 0
x-1.22*x+5840 = 0
5840-0.22*x = 0
(5840-0.22*x)/x = 0
(5840-0.22*x)/x = 0 // * x
5840-0.22*x = 0
5840-0.22*x = 0 // - 5840
-0.22*x = -5840 // : -0.22
x = -5840/(-0.22)
x = 26545.45454545
x = 26545.45454545
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