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)
x = 1/(1-0.9) // - 1/(1-0.9)
x-(1/(1-0.9)) = 0
x-(1-0.9)^-1 = 0
x-10 = 0 // + 10
x = 10
x = 10
| 16-20u=-11u-20 | | -3+2(3)/4+4(-3) | | z+7=-28 | | -13+13v=14v+1 | | -7m^2-4m^2-5m^2= | | -5(2t-3)+3t=4t-5 | | z-15=-45 | | -n-16n+16=-20n-5 | | f(-1)=1/2(-1)+2/3 | | -6k=-5k-7 | | -15z=45 | | X+3/5=8/5 | | -2b=-9-3b | | 3x-5(x+4)=2(x+6) | | 5y+6x=9x+4 | | -2(x+4)-4(x-8)=2(x+1) | | z+(-7)=15 | | b^2+b-6= | | 3h-12-2h=2h+4-2h | | 12g+10h-3g= | | 7*(3*3-11)+(5*2+2)/4 | | 2x-13y=-25 | | 8(r-3)-7(r-1)=2(r+7) | | -6z-6=-5z+9-6z | | 3x-2=9x+26 | | z-12=-29 | | -5(2t-2)+2t=5t-7 | | 5x-3x+4x-5+2x= | | 6*(2+x)=16-n | | 2g-1=-10-5g+8g | | 7w+6-2w+2= | | 3x+2y=540 |