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n in (-oo:+oo)
(3/4)*n-((2/3)*n)+2 = 5 // - 5
(3/4)*n-((2/3)*n)-5+2 = 0
(3/4)*n+(-2/3)*n-5+2 = 0
1/12*n-3 = 0 // + 3
1/12*n = 3 // : 1/12
n = 3/1/12
n = 36
n = 36
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