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)
(4/7)*a-((5/6)*a)+2/5 = -27/70 // + -27/70
(4/7)*a-((5/6)*a)+2/5-(-27/70) = 0
(4/7)*a+(-5/6)*a+2/5+27/70 = 0
11/14-11/42*a = 0 // - 11/14
-11/42*a = -11/14 // : -11/42
a = -11/14/(-11/42)
a = 3
a = 3
| 1/4-3/5w+2/3w=21/20 | | 1/2+4/7a-1/3a=73/126 | | 3/4-4/5n+3n=207/100 | | -9/2=-5w-2w-1 | | 7+m=37/5 | | 5+3t=-13 | | 4/7b+8=12/7 | | 5/7t+8=173/21 | | -5/6a-1=-7/2 | | -1/7-2x=-8/7 | | -1/7d+4/7=-4/7 | | 6/7d+2/5=194/35 | | 7w+1/5=-139/5 | | -4/9+a=10/99 | | 4/5m+8=42/5 | | -1/7-2a=25/21 | | 2/5b+1/3=-11/3 | | -4/7n-3=27/7 | | 5/7d-7=-569/77 | | -4/7+1/3b=-221/252 | | -2/5+6x=-92/5 | | 4-1/6d=95/24 | | 3/4+6/7n=45/28 | | 7/9-5/6n=13/36 | | 3/7d+9=66/7 | | -1/6b-8=-527/66 | | 5/7d-1/3=-172/21 | | w-8=-15 | | 3-4m=1 | | 2b+5/6=17/6 | | 3-x/8=-2 | | 1/5n+1/4=9/20 |