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x in (-oo:+oo)
835 = (4200000/0.785)*x // - (4200000/0.785)*x
835-((4200000/0.785)*x) = 0
835-5350318.47133758*x = 0
835-5350318.47133758*x = 0 // - 835
-5350318.47133758*x = -835 // : -5350318.47133758
x = -835/(-5350318.47133758)
x = 0.00015607
x = 0.00015607
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