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y in (-oo:+oo)
8/5 = (11.2/2)*y-1 // - (11.2/2)*y-1
8/5-((11.2/2)*y)+1 = 0
8/5-5.6*y+1 = 0
13/5-5.6*y = 0 // - 13/5
-5.6*y = -13/5 // : -5.6
y = -13/5/(-5.6)
y = 0.46428571
y = 0.46428571
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