If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
1-7*k-k = -47 // + 47
1-7*k-k+47 = 0
48-8*k = 0 // - 48
-8*k = -48 // : -8
k = -48/(-8)
k = 6
k = 6
| 6n+2-5n=9 | | -5m+5+7m=17 | | 2n+6+6n=6 | | 7w+2+w=66 | | 8-6k+k=28 | | 3=3m+7m+3 | | -4m+1-2m=-17 | | 7=-2n-6n+7 | | -7m+10+5m=32 | | -10+b+3b=-58 | | -14=4w+4w-6 | | 9-4d-4d=65 | | 4b+8-6b=2 | | -4a+1+5a=8 | | 6w-5+3w=94 | | 2-5t+3t=-20 | | 22=6n-4n+2 | | -2a-6-7a=-60 | | -2d+7-3d=17 | | -7+2t+5t=21 | | 10=n-6n+5 | | x-2+6x=82 | | -1+k+5k=5 | | 3n+9+7n=-1 | | 4n+6-2n=6 | | -65=5d+5d+5 | | 79=n+7n-9 | | 3-7t-3t=-107 | | 2x+2+4x=20 | | 4d-8+2d=-44 | | 5+4w+4w=45 | | 7t+5+2t=-67 |