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)
5*k+4 = (5/7)*k+58/7 // - (5/7)*k+58/7
5*k-((5/7)*k)-(58/7)+4 = 0
5*k+(-5/7)*k-58/7+4 = 0
30/7*k-30/7 = 0 // + 30/7
30/7*k = 30/7 // : 30/7
k = 30/7/30/7
k = 1
k = 1
| 1/3w-3/8=-145/216+w | | 5/7m+1=83/42-3/4m | | 4a-3/4=-7a+161/20 | | -2/3w+10=7w+56 | | -1/2k-9=-52/5+3k | | -1/3m-3/5=-59/15+3m | | -6m+1=-6/7m-13/5 | | 2t+4=12-6t | | 6d-3=-39/28-3/7d | | 4/7+3m=-3/5m+272/35 | | -3/7x-5=-85/7+x | | 3k-1/6=-2k+229/66 | | 3/4a+1/8=-49/24+4a | | 6+6m=5/6m+191/6 | | 5-7k=-4k+3 | | -1/4-7m=-5/7m+169/28 | | k-10=-3/5k-142/15 | | 4x-5/7=6x-4/35 | | 4+3/5k=3k-124/5 | | 4a+6=45/8+3a | | 3/10+4k=-1/2k-21/5 | | -2/5x-3/10=-1/3x-13/30 | | -2/3a-5=-28/9+5a | | 4/5-1/2k=3/5k+1/4 | | 6w-2/5=2w+178/5 | | 3-1/2n=1/2n+5/2 | | 7k+8=4k+9 | | -6/7+7b=3/4b+139/42 | | 3/7n-2/9=3n-95/63 | | -b-5/8=3b+27/8 | | 2w-3=6/7w-85/7 | | 3/10-2n=-5/6n+23/30 |