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Y in (-oo:+oo)
Y/0.2 = 0.3 // - 0.3
Y/0.2-0.3 = 0
5*Y-0.3 = 0 // + 0.3
5*Y = 0.3 // : 5
Y = 0.3/5
Y = 0.06
Y = 0.06
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