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n in (-oo:+oo)
7*n+3/4 = 59/4 // - 59/4
7*n+3/4-(59/4) = 0
7*n+3/4-59/4 = 0
7*n-14 = 0 // + 14
7*n = 14 // : 7
n = 14/7
n = 2
n = 2
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