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-((1/2)*k) = 6/7 // - 6/7
1-((1/2)*k)-(6/7) = 0
(-1/2)*k-6/7+1 = 0
1/7-1/2*k = 0 // - 1/7
-1/2*k = -1/7 // : -1/2
k = -1/7/(-1/2)
k = 2/7
k = 2/7
| 8/9+5b=413/9 | | -2/3b-1/10=-71/110 | | -7m-3/5=-388/5 | | -5/6a+7=427/66 | | 4/7-3/7t=4/7 | | 1/2+3/7k=23/154 | | 2/3a-7/8=59/24 | | 6-2/5w=46/5 | | 5/7w+4=338/77 | | 1/2w+7/10=9/20 | | 2/3w-9=-1 | | -6/7a+1=-23/7 | | 1/4w+6=267/44 | | 3t-9=-33/4 | | 3/7+3k=15/7 | | 6n-5=55 | | 3/5x-4=-11/5 | | 6d-1/5=-1/5 | | 7k+5=47 | | 6/7b+3/10=81/70 | | 2/7w-2=-2 | | -3/7-w=81/7 | | 7+1/3t=10 | | 6b-5=43 | | 2+3/4w=11 | | -t+8=12 | | 8+2n=20/3 | | 2/3+4w=-44/15 | | f(x)=1x+21 | | k-4/5=-1/5 | | 6+3/5b=0 | | -3/4-2/5t=13/4 |