If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
(-4/5)*n+3*n+8 = -81/5 // + -81/5
(-4/5)*n+3*n-(-81/5)+8 = 0
(-4/5)*n+3*n+81/5+8 = 0
11/5*n+121/5 = 0 // - 121/5
11/5*n = -121/5 // : 11/5
n = -121/5/11/5
n = -11
n = -11
| 169/16=-1/4b+b+10 | | -11/3=m+1/3m-1 | | -25/9=-m-3m+5/9 | | 3m+9-4/5m=269/25 | | -m+10+5m=118/11 | | 4a+1-3a=13/11 | | 201/7=-4d+2/7d-1 | | 17/3=-3m-4m-3/4 | | 1-1/2d+3d=7/4 | | -4/5n+5/6-3/5n=113/60 | | -1+5/6d+1/3d=-103/54 | | 6b-3/4+4b=17/4 | | 2/3t+1/8+t=19/24 | | 692/9=-2/3x+7x+8/9 | | -b+6+1/2b=21/2 | | 6=5w+2w+6 | | 4x-2/3+7x=-233/3 | | -1-2n+1/2n=-11/20 | | 13/15=d-2d+1/5 | | 61/5=-2/3x+6x+9 | | 7b-2-1/5b=-2/35 | | 4m-2/3+4/5m=-34/15 | | 190/21=5/7t+3/7t+10 | | 6k-4/9-3k=77/9 | | 131/14=-5d+4/7d+1/2 | | 2t-2/7+7t=-443/7 | | 7x+1/5-3x=221/5 | | -1/4a-2/3+a=-31/60 | | 73/5=3b-6/7b-2/5 | | 17=-2x+3x+8 | | k+7+4/7k=159/7 | | -69/14=-6/7x+x-5 |