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+4/7 = 4/7 // - 4/7
5*k+4/7-(4/7) = 0
5*k+4/7-4/7 = 0
5*k = 0 // : 5
k = 0
k = 0
| -1/5m+1=9/5 | | 5n+6=3n+3 | | 5n+6=3n+1 | | 4-4t=2 | | t+1=-8 | | -3/5x-2=-2 | | 2/3+5/7k=74/21 | | 2n-1/3=-1 | | 6n+3=-39 | | 1-1/2k=-9/2 | | 6+3/4k=27/4 | | 2w+2=20 | | -1/3+3k=25/33 | | 2/5+4w=-138/5 | | -6w+5/7=85/21 | | 3t+9/10=339/10 | | 4+2w=5/2 | | 5/6d+1=31/6 | | 3a-3/5=-96/35 | | -6k+9=-45 | | 5t+3/8=7/8 | | -12=-4x-8 | | 1-4/7b=17/14 | | 4n+4=10/3 | | -6m+1=-65 | | 3/5b-1/3=-1/3 | | 1/3t+7=41/6 | | -8+3b=4 | | 4/7b+1/2=55/14 | | x*x-49=0 | | 10x+4x+3=31 | | 5t-3/7=417/7 |