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)
7*k-5 = -47 // + 47
7*k-5+47 = 0
7*k+42 = 0 // - 42
7*k = -42 // : 7
k = -42/7
k = -6
k = -6
| 8-4b=-4 | | -4+6d=-34 | | -7+2b=15 | | -4m-6=-14 | | -3m+3=0 | | 4-3x=-29 | | 4+7a=-45 | | -2b-9=11 | | 4w-9=-41 | | 7n+7=-56 | | 4a-7=-19 | | 2k+1=13 | | 6w+7=61 | | -6m+2=-52 | | -2x-4=18 | | -10+3n=-10 | | 2d-5=9 | | 2a+8=32 | | 6w-4=-28 | | 9+4t=17 | | 6m-3=45 | | 4n+7=-9 | | 7n-1=-57 | | -8-7t=34 | | -5a+5=50 | | -8+4t=-8 | | 6m+2=26 | | 7t+2=9 | | 2-7b=-82 | | -3w-6=-33 | | 4k+10=30 | | 8+6m=-4 |