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x in (-oo:+oo)
V = 1.03*40*(2/5)*x // - 1.03*40*(2/5)*x
V-(1.03*40*(2/5)*x) = 0
V-16.48*x = 0
V-16.48*x = 0 // - V
-16.48*x = -V // : -16.48
x = -V/(-16.48)
x = 0.06067961*V
x = 0.06067961*V
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