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)
31/8 = 5*n+4*n+1/2 // - 5*n+4*n+1/2
31/8-(5*n)-(4*n)-(1/2) = 0
31/8-5*n-4*n-1/2 = 0
27/8-9*n = 0 // - 27/8
-9*n = -27/8 // : -9
n = -27/8/(-9)
n = 3/8
n = 3/8
| 4/5t-1+t=67/5 | | 2b+1/3+2/3b=89/3 | | 80+4y/5=5x/5 | | -169/56=-6/7n+5/6n-3 | | -3/5-2/7k-k=-426/35 | | -n-8+5n=-12 | | 7/8-7a-a=7/8 | | -7-2/7b+3b=12 | | 5x+4y/5=5x/5 | | 5/9+1/7k+k=89/63 | | 1-1/2b+1/5b=-4/5 | | -596/77=6x+6/7x-4 | | 11/2=5x+4x+1 | | 121/18=2a-3/4a-7/9 | | a+4/5+4a=-101/30 | | 13=2b-b+4 | | 9=4/7b-4/7b+9 | | 7t+6/7+1/4t=2257/28 | | 5/8=b/12 | | 3/10-n+2/3n=119/30 | | w-1+5/7w=-4/7 | | -3/4x+2+1/2x=5 | | 3+1/2d+1/3d=8 | | 3d-3/7+3d=-255/7 | | 3/4t+3/8+1/2t=9/8 | | 8/11=-1/2a-2a+3 | | 4+1/2t-5/6t=107/27 | | b+4/7+7b=-668/7 | | 3/5+3b+4b=388/5 | | 7/8+5/6a+1/7a=59/126 | | 7+3/5x+5x=133/15 | | 3a+1+a=-23 |