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y in (-oo:+oo)
(5/8)*y > -4 // + 4
(5/8)*y+4 > 0
5/8*y+4 > 0 // - 4
5/8*y > -4 // : 5/8
y > -4/5/8
y > -32/5
y in (-32/5:+oo)
(-32/5:+oo)
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