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n in (-oo:+oo)
(4/5)*(3*n+2) = 1/2 // - 1/2
(4/5)*(3*n+2)-(1/2) = 0
(4/5)*(3*n+2)-1/2 = 0
4/5*(3*n+2)-1/2 = 0
(4/5*2*(3*n+2))/2-1/2 = 0
4/5*2*(3*n+2)-1 = 0
24/5*n+11/5 = 0
(24/5*n+11/5)/2 = 0
(24/5*n+11/5)/2 = 0 // * 2
24/5*n+11/5 = 0
24/5*n+11/5 = 0 // - 11/5
24/5*n = -11/5 // : 24/5
n = -11/5/24/5
n = -11/24
n = -11/24
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