If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
(5/7)*a+(2/5)*a-(1/7) = 346/35 // - 346/35
(5/7)*a+(2/5)*a-(1/7)-(346/35) = 0
(5/7)*a+(2/5)*a-1/7-346/35 = 0
39/35*a-351/35 = 0 // + 351/35
39/35*a = 351/35 // : 39/35
a = 351/35/39/35
a = 9
a = 9
| 5w+5-2w=6 | | 3w+5/8-2/7w=295/168 | | -2/5b+1+5b=189/5 | | 1/3b-9+6b=-202/33 | | 7X+6Y=-18 | | 2/3+w+5w=146/3 | | 1/2d+3/4+1/5d=31/4 | | 2/3b+10+2/3b=38/3 | | 1/6d+2-3d=19/18 | | 2/3t+5/8-5t=-667/264 | | 0=x^2+9x-12 | | 5/8-1/3x+7x=-315/8 | | 3w-1/2+1/2w=-3/2 | | 337/28=5/7x+6x+7 | | -293/7=4/7k+6k-9 | | 2/3+7m+3/4m=323/66 | | 5x+2+x=7/5 | | 32/7=2d+4d+4/7 | | -2/3a+6+2a=10/3 | | -m+5/7+7m=-373/7 | | 2t+6+t=15/4 | | -469/55=5k+2/5k-10 | | 3+4n+n=33 | | -6d+1-6d=-83 | | 3000-120t=4000-160t | | -170/7=6t-2/7t+10 | | 37/180=-w+4/5w+1/4 | | 303/44=-2/3k+1/4k+7 | | 10-2/3x-5x=13/3 | | 5/6m-9+5m=-332/33 | | 9+2d+4d=57 | | 7+5b+3b=-89 |