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)
(-5/6)*a+7 = 427/66 // - 427/66
(-5/6)*a-(427/66)+7 = 0
(-5/6)*a-427/66+7 = 0
35/66-5/6*a = 0 // - 35/66
-5/6*a = -35/66 // : -5/6
a = -35/66/(-5/6)
a = 7/11
a = 7/11
| 4/7-3/7t=4/7 | | 1/2+3/7k=23/154 | | 2/3a-7/8=59/24 | | 6-2/5w=46/5 | | 5/7w+4=338/77 | | 1/2w+7/10=9/20 | | 2/3w-9=-1 | | -6/7a+1=-23/7 | | 1/4w+6=267/44 | | 3t-9=-33/4 | | 3/7+3k=15/7 | | 6n-5=55 | | 3/5x-4=-11/5 | | 6d-1/5=-1/5 | | 7k+5=47 | | 6/7b+3/10=81/70 | | 2/7w-2=-2 | | -3/7-w=81/7 | | 7+1/3t=10 | | 6b-5=43 | | 2+3/4w=11 | | -t+8=12 | | 8+2n=20/3 | | 2/3+4w=-44/15 | | f(x)=1x+21 | | k-4/5=-1/5 | | 6+3/5b=0 | | -3/4-2/5t=13/4 | | 2/5+1/3x=34/135 | | 6-3n=-21 | | 2/7m+10=352/35 | | 9+1/2k=12 |