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)
64 = (1/3)*k-6*k-4 // - (1/3)*k-6*k-4
4-(-6*k)-((1/3)*k)+64 = 0
6*k+(-1/3)*k+4+64 = 0
17/3*k+68 = 0 // - 68
17/3*k = -68 // : 17/3
k = -68/17/3
k = -12
k = -12
| 3/4b-5-3/5b=-121/20 | | 3/5+1/2x-3/7x=6/35 | | 25/3=5t+1/3t+5 | | 4n+1-n=41/11 | | -5/7a+3-5/6a=3 | | n+3-2/3n=19/3 | | m+3-5m=-41 | | -6-t+3t=-52/9 | | 101=5d+6d+2 | | 5/6x+3/7-2/3x=3/7 | | -263/4=a+5a+1/4 | | 4n+9+n=-26 | | 1/3m+7/10-3m=-157/90 | | -657/10=m+5m+3/10 | | 6/7t-4-2/7t=8/7 | | 121/5-34/5 | | -x+7-1/3x=53/9 | | 4b+1/2+5/7b=37/8 | | -1/4-4m-5m=-37/4 | | -6+1/2n+n=-36/5 | | 1/5k+3/7-1/2k=9/70 | | 9y-5-3y=9(x+1)-5y | | 2/5=-2/3d-d+2/5 | | 7b+1-3/7b=233/49 | | 2x*x+14x-60=0 | | 3+t+t=17/9 | | -9/14=5d-2/7d-3 | | 3m+9+5/6m=169/6 | | 1/3=5t-2t-2/3 | | 7/9-5t+3t=-8/9 | | 2/5+7a-4/5a=-44/45 | | 688/35=n+4/7n+4/5 |