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n in (-oo:+oo)
(3/4)*(2*n+1/3)-((1/5)*((-5/8)*n+20)) = 19/4 // - 19/4
(3/4)*(2*n+1/3)-((1/5)*((-5/8)*n+20))-(19/4) = 0
(3/4)*(2*n+1/3)+(-1/5)*((-5/8)*n+20)-19/4 = 0
3/4*(2*n+1/3)-1/5*(20-5/8*n)-19/4 = 0
(3/4*4*(2*n+1/3))/4+(-1/5*4*(20-5/8*n))/4-19/4 = 0
3/4*4*(2*n+1/3)-1/5*4*(20-5/8*n)-19 = 0
13/2*n-19-15 = 0
13/2*n-34 = 0
(13/2*n-34)/4 = 0
(13/2*n-34)/4 = 0 // * 4
13/2*n-34 = 0
13/2*n-34 = 0 // + 34
13/2*n = 34 // : 13/2
n = 34/13/2
n = 68/13
n = 68/13
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