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n in (-oo:+oo)
(-1/5)*(n+1/8) = (3/4)*(n-(3/4)) // - (3/4)*(n-(3/4))
(-1/5)*(n+1/8)-((3/4)*(n-(3/4))) = 0
(-1/5)*(n+1/8)+(-3/4)*(n-3/4) = 0
-1/5*(n+1/8)-3/4*(n-3/4) = 0
-1/5*(n+1/8)-3/4*(n-3/4) = 0
43/80-19/20*n = 0
43/80-19/20*n = 0
43/80-19/20*n = 0 // - 43/80
-19/20*n = -43/80 // : -19/20
n = -43/80/(-19/20)
n = 43/76
n = 43/76
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