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n in (-oo:+oo)
(-3/4)*n+1/2 = 5/16 // - 5/16
(-3/4)*n+1/2-(5/16) = 0
(-3/4)*n+1/2-5/16 = 0
3/16-3/4*n = 0 // - 3/16
-3/4*n = -3/16 // : -3/4
n = -3/16/(-3/4)
n = 1/4
n = 1/4
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