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)
2*k-7 = 9 // - 9
2*k-9-7 = 0
2*k-16 = 0 // + 16
2*k = 16 // : 2
k = 16/2
k = 8
k = 8
| 8+4n=8 | | 2k+8=26 | | 3t-6=0 | | 7k-9=19 | | -2t-5=-17 | | -7n-3=-38 | | 3d-1=-4 | | 2d+1=25 | | 1+5w=-4 | | (2x+0.59)/(2x+1.41) | | -6m-4=62 | | 2a+3=21 | | -2d+3=-3 | | 9+4k=45 | | 7n-2=-65 | | -3n+6=24 | | 6w+6=30 | | 6-3w=-18 | | -5t-6=-56 | | 4a+2=38 | | 7t-10=18 | | 2a-2=22 | | 10-7w=10 | | 3+3b=36 | | 2n-7=-27 | | 7w+3=17 | | 6b-5=-77 | | 4d-8=24 | | 4w+6=-10 | | 6k-4=44 | | -4-6n=-4 | | 4m+7=39 |