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y in (-oo:+oo)
(3/8)/100 = (7*y)/250 // - (7*y)/250
(3/8)/100-((7*y)/250) = 0
(-7/250)*y+(3/8)/100 = 0
3/800-7/250*y = 0 // - 3/800
-7/250*y = -3/800 // : -7/250
y = -3/800/(-7/250)
y = 15/112
y = 15/112
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