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)
(2/3)*k+(5/7)*k+1/5 = 437/735 // - 437/735
(2/3)*k+(5/7)*k+1/5-(437/735) = 0
(2/3)*k+(5/7)*k+1/5-437/735 = 0
29/21*k-58/147 = 0 // + 58/147
29/21*k = 58/147 // : 29/21
k = 58/147/29/21
k = 2/7
k = 2/7
| 3/4x+4-3x=95/44 | | 6t+1/4+t=253/4 | | -7w+5/6+5/7w=155/42 | | t+4/7+6t=445/7 | | 97/28=6m-m-2/7 | | 1/2+4/5d+5/6d=79/60 | | h/2+3=10 | | 1-3b-b=45 | | -2/3k-3/5+2/3k=-3/5 | | 3/10+n-7n=-17/10 | | 2/7m+2/3+1/2m=-184/21 | | 4a+1/10-1/2a=397/120 | | 5k-1-5/6k=1/24 | | -5/7k-5+4/5k=-1943/385 | | 127/6=2n-1/6n+1 | | 2/7m+1+m=-65/7 | | 129/11=-5b+2b+9 | | 36=-3d+7d-8 | | 10+4a+3/4a=-55/4 | | 2/5n+5/6+3/5n=7/4 | | 7-2/5a-7a=52/55 | | 4+4d+5d=13 | | -3/5=w+w+1 | | 3/8+7x+4x=1059/8 | | 99/2=5/6d-7d-6 | | 2/7w+1/3+5w=562/21 | | 2x-13=6x+2 | | -23/40=4/5x+3/4x+1/5 | | -2/5t-1/10-4t=439/10 | | 1-7k+1/2k=145/2 | | 1-n-3n=0 | | 5/6k+10-1/3k=15/2 |