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q in (-oo:+oo)
(-4/5)*(q+1) = -11/2 // + -11/2
(-4/5)*(q+1)-(-11/2) = 0
(-4/5)*(q+1)+11/2 = 0
11/2-4/5*(q+1) = 0
(-4/5*2*(q+1))/2+11/2 = 0
11-4/5*2*(q+1) = 0
47/5-8/5*q = 0
(47/5-8/5*q)/2 = 0
(47/5-8/5*q)/2 = 0 // * 2
47/5-8/5*q = 0
47/5-8/5*q = 0 // - 47/5
-8/5*q = -47/5 // : -8/5
q = -47/5/(-8/5)
q = 47/8
q = 47/8
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