If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(1/81)*x = 0
1/81*x = 0 // : 1/81
x = 0
x = 0
| -39=-2b+1 | | 4sin^2x-8sinx-5=0 | | 5-6a=4 | | -45=9u+72 | | 15x+1627=12389 | | y=x^2+26x+160 | | 2x+4x+4x=180 | | -h-9-9+8h-6h=-12-1-5+0 | | -28-4r=-36 | | 12=-42+6u | | y=1/2x-8;(-6,-17) | | B-2=13 | | 12y+36=84 | | 10y+8=4y-7 | | 5x+15-3y=0 | | 10(10+10)+1= | | Vs=4t+2 | | s=4t+2 | | 6=4(x-5) | | -100x^4/10x^2= | | -55+11x=-22 | | log(40x)=0 | | ln(40x)=0 | | 64x-2(4x-1)=0.6 | | 2x+7=10x-39 | | 108+12a=84 | | 8x-0.7+4x-0.04= | | 5x-149=38-6x | | 0.6x+14.6=x-8.08 | | -6r-30=54 | | -6+2a=14 | | -2p+11=7 |