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)
(6/7)*k = -6/7 // + -6/7
(6/7)*k-(-6/7) = 0
(6/7)*k+6/7 = 0
6/7*k+6/7 = 0 // - 6/7
6/7*k = -6/7 // : 6/7
k = -6/7/6/7
k = -1
k = -1
| 15=a+6 | | k+4=14 | | m+1=-3 | | w+7=16 | | w+7/8=79/8 | | x+1/9=-8/9 | | m+1/2=-15/2 | | n+1/5=8/15 | | w-1/2=21/2 | | 9a+4=22 | | 2b=-5/3 | | t-2/5=58/5 | | 9/2=x+4 | | n-2/9=-5/36 | | -2/3n=22/3 | | x^4-3x+20=0 | | -1/2+m=-1/2 | | 2/5n=4/15 | | b+9=33/4 | | 1/6+w=1/6 | | m-2/3=13/3 | | 1+k=17/9 | | 2/5+d=7/5 | | -28/5=w-6 | | 6+n=20/3 | | k+4=9/2 | | 17/12=b+2 | | 12=k+2 | | n-8=-26/3 | | 7+d=57/8 | | a/7-1=7 | | a+5/6=13/30 |