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)
3*k-(4/5) = 4*k+16/5 // - 4*k+16/5
3*k-(4*k)-(4/5)-(16/5) = 0
3*k-4*k-4/5-16/5 = 0
-k-4 = 0 // + 4
-k = 4 // * -1
k = -4
k = -4
| t+10=-5/6t+251/24 | | 5b-2=7b-14 | | x-(-5.4)=41 | | 2/3d+3=109/15-2/5d | | 5w+10=4w+13 | | -5/6+m=-2/3m-11/6 | | 2/9-2d=4d-52/9 | | -2/5w+3/4=211/20+w | | 5a-7=25/9-6a | | 4b+1/10=-5b+901/10 | | 1/2a+7=-1/3a+23/3 | | 5/7m+2/5=-36/35+5/6m | | 3/7k-1/3=-19/21+4/7k | | X+(99+x)+(x-75)=390 | | b+7=-13+3b | | 2/7d+4=-3d+143/7 | | 2/3+5x=4x+40/33 | | 1/2a+5=a+19/4 | | 3-3a=6/7a-276/7 | | 4-1/3b=1/4b+118/33 | | -5w+2/3=3w-50/9 | | -2/7-2k=-3k+41/77 | | 5x-1(-1)=9 | | 2/5a+3/4=1071/20+7a | | 5x+1(-y)=9 | | 1/2+3w=w-3/10 | | 5+4t=6/7t+333/49 | | 1/4x+2=47/28+2/7x | | w-1/2=-5w-61/2 | | -t+2=3t-38 | | 2d+4/9=5d-185/9 | | 6w-10=-30+w |