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n in (-oo:+oo)
(1/3)*n-(11/25) = 3/10 // - 3/10
(1/3)*n-(11/25)-(3/10) = 0
(1/3)*n-11/25-3/10 = 0
1/3*n-37/50 = 0 // + 37/50
1/3*n = 37/50 // : 1/3
n = 37/50/1/3
n = 111/50
n = 111/50
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