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)
(1/2)*a-3*a-(4/9) = -101/126 // + -101/126
(1/2)*a-3*a-(4/9)-(-101/126) = 0
(1/2)*a-3*a-4/9+101/126 = 0
5/14-5/2*a = 0 // - 5/14
-5/2*a = -5/14 // : -5/2
a = -5/14/(-5/2)
a = 1/7
a = 1/7
| -3a-4=6a+86 | | -3a-4=3a-37/4 | | -3a-3/4+1/7a=-901/28 | | -3a-3=-14/3 | | -3a+9=-21 | | 23=4-7x | | 5(3-2x)-12=-18 | | -3a+9=-15 | | 15-10x-12=18 | | -3a+9+2/5a=238/25 | | -3a+6=25+1/6a | | -3a+6-3a=9/5 | | -3a+5=79/11 | | -3a+5=7/2 | | -3a+5=29+3a | | -3a+4/9=-185/9 | | -3a+4=37 | | -3a+4=-26 | | -3a+3/8=-39/40-3/4a | | -3a+3-4a=-67 | | -3a+2/9=-79/9 | | -3a+10=37 | | 8x-32=9-5 | | -3a+1/3=7a-11/2 | | -3a+1/2=23/10 | | -3a+1/10=-27/50+1/5a | | -33=x-4x+3 | | -30=-5b-6b+3 | | 5(3-2x)-12=18 | | -3=m-10 | | -3=m+5 | | -3=d-7 |