If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
(840*k+3)/9 = 0
840*k+3 = 0 // - 3
840*k = -3 // : 840
k = -3/840
k = -1/280
k = -1/280
| 4g-3g=13 | | g(x)=0.87x | | f(x)=0.19x+132 | | f(x)=0.16x+132 | | x/2+=10 | | 3(2r-2)= | | 7/9z^3y-1/21z^2y | | 36x^2-48x-12=0 | | x+3.5=5.7 | | 8x^2-6x=2x | | x-3=5.2 | | x-3=5.2 | | x-3=5.2 | | x-3=5.2 | | 5x-7y=25 | | x=arcsin(0.72) | | 6x+54+9x=2x^2+18x | | 10m-2+4m-5= | | 3+3(1)=6 | | 6x/2+72x+192=0 | | x/5-2=8 | | 3xy-xyc+12x-4xc=1 | | 4x^2-6y+9=-y^2+16x | | 2w+2l=114 | | -x^2=9 | | 2(x-5)+3(x-2)=19 | | X+4+2x=28 | | 14-v/9=12 | | 3x^3-10x+6=0 | | 18=8+10x | | 1+25x=5(5x+4) | | 5+15z-1=9z+60-2z |