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)
8-(7*k) = 8 // - 8
8-(7*k)-8 = 0
8-7*k-8 = 0
-7*k = 0 // : -7
k = 0
k = 0
| 5x-6=-51 | | 2+2d=-20 | | 7-4d=7 | | -9+4k=39 | | 4-5t=-36 | | 2x=2x^2-2 | | 4b+10=18 | | -9-4n=-37 | | 6+7k=-36 | | -4a+6=46 | | 2(x+1)(x-3)=5 | | -1+4x=47 | | -7+4a=29 | | -1+6t=-55 | | 4k-7=-39 | | 4+6t=-32 | | -4t+7=-5 | | 9+7n=-12 | | 2k+10=16 | | (-4x/7)=6 | | 5+4m=45 | | 3b+5=-31 | | -6m+4=-50 | | 21x-(72+8x)=5x+88 | | 4-4t=-28 | | -7-6k=59 | | 6t-5=31 | | 2t+10=18 | | 3m-10=20 | | 3k+8=23 | | 2d-2=-8 | | 6-6k=-24 |