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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
3/4*(n-3/4)-1/5*(n+1/8) = 0
3/4*(n-3/4)-1/5*(n+1/8) = 0
11/20*n-47/80 = 0
11/20*n-47/80 = 0
11/20*n-47/80 = 0 // + 47/80
11/20*n = 47/80 // : 11/20
n = 47/80/11/20
n = 47/44
n = 47/44
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