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q in (-oo:+oo)
280 = 496-((3/2)*q) // - 496-((3/2)*q)
(3/2)*q-496+280 = 0
3/2*q-216 = 0 // + 216
3/2*q = 216 // : 3/2
q = 216/3/2
q = 144
q = 144
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