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)
6-a = (1/3)*(9*a-18) // - (1/3)*(9*a-18)
6-((1/3)*(9*a-18))-a = 0
(-1/3)*(9*a-18)-a+6 = 0
6-1/3*(9*a-18)-a = 0
6-1/3*(9*a-18)-a = 0
6-4*a+6 = 0
12-4*a = 0
12-4*a = 0
12-4*a = 0 // - 12
-4*a = -12 // : -4
a = -12/(-4)
a = 3
a = 3
| 14x+12=7x+46 | | 5+2(x-1)=14 | | g(1)=-1 | | 20x-10x=30 | | 4g+4(-7+3g)=1-6 | | 10=w-6 | | 3(x-2)+5=7+x | | 2t-4v=-kv+8 | | q+3=10 | | 20x-10y=30fory | | h(2)=7 | | 5x-5=30x+15 | | 1.10(x-4)+2.15=18.65 | | -2/3v=-4 | | 2k-4v=-kv+8 | | 1.6x+8=-16 | | x+5=5(3x-3) | | 2x-3(x+y)=y | | -18=-3/2v | | 35+25n=620 | | 4x-4y=10+x | | 16+14=-5(3x-6) | | 7g-3=1-g | | 80(r)=-30(100) | | 8x-2(x+5)=25 | | -2=2x+9 | | ay+p=at+uy | | 19=-1/2x-5 | | ay+p=at+it | | 4g+4(-7+3G)=1-g | | 20x-10y=30 | | -2+u=-6 |