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x in (-oo:+oo)
((1300000-x)/2)/1300000 = 0.08 // - 0.08
((1300000-x)/2)/1300000-0.08 = 0
(1300000-x)/(2*1300000)-0.08 = 0
(1300000-x)/(2*1300000)+(-0.08*2*1300000)/(2*1300000) = 0
1300000-x-0.08*2*1300000 = 0
1092000-x = 0
(1092000-x)/(2*1300000) = 0
(1092000-x)/(2*1300000) = 0 // * 2*1300000
1092000-x = 0
1092000-x = 0 // - 1092000
-x = -1092000 // * -1
x = 1092000
x = 1092000
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