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n in (-oo:+oo)
(1/3)*n+4*n+10 = 4/3 // - 4/3
(1/3)*n+4*n-(4/3)+10 = 0
(1/3)*n+4*n-4/3+10 = 0
13/3*n+26/3 = 0 // - 26/3
13/3*n = -26/3 // : 13/3
n = -26/3/13/3
n = -2
n = -2
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