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n in (-oo:+oo)
(2/3)*(2*n-9)+4 = 14 // - 14
(2/3)*(2*n-9)-14+4 = 0
2/3*(2*n-9)-14+4 = 0
2/3*(2*n-9)-14+4 = 0
4/3*n-20+4 = 0
4/3*n-16 = 0
4/3*n-16 = 0
4/3*n-16 = 0 // + 16
4/3*n = 16 // : 4/3
n = 16/4/3
n = 12
n = 12
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