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x in (-oo:+oo)
(1000-x)/7.14+x/11.3 = 0
(1000-x)/7.14+0.08849558*x = 0
(1000-x)/7.14+(0.08849558*7.14*x)/7.14 = 0
0.08849558*7.14*x-x+1000 = 0
1000-0.3681415588*x = 0
(1000-0.3681415588*x)/7.14 = 0
(1000-0.3681415588*x)/7.14 = 0 // * 7.14
1000-0.3681415588*x = 0
1000-0.3681415588*x = 0 // - 1000
-0.3681415588*x = -1000 // : -0.3681415588
x = -1000/(-0.3681415588)
x = 2716.3464056
x = 2716.3464056
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