If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( z )
z = 0
z = 0
z = 0
z in (-oo:0) U (0:+oo)
5/z = 12/7 // - 12/7
5/z-(12/7) = 0
5/z-12/7 = 0
5*z^-1 = 12/7 // : 5
z^-1 = 12/35
-1 < 0
1/(z^1) = 12/35 // * z^1
1 = 12/35*z^1 // : 12/35
35/12 = z^1
z = 35/12
z = 35/12
| 24=-4/3 | | 9x^2+19x+2= | | 18=2x+9x | | -7x-3-4x=-35 | | 6m+2+5m-4=56 | | 2x-16x^4=0 | | 4y+2y-8+6y+20=180 | | 3(2g-1)+7=3g+16 | | 6-4x=-8x+18 | | 3x+12=12+7x | | 1.5r+15=2.26r | | 2(2x+5)=50 | | X+10-2x=4 | | 9/5-18=2 | | -9(11-3n)+2n=-2n+6(7n+11) | | 5x+17=17+4x | | 15/(3/4) | | 4(x-(2))-12=3(x-(2)) | | -4(r+3)=-79 | | 36+6a=6(3a-4) | | 1+x=x+1+1-1 | | xsquared-7x+4=-6 | | m+5(m-7)=7 | | -9=8+y | | 1.2z-y= | | r-9=-20 | | -c=ax+bx | | 53+15x=10x+68 | | 2(x+7)=4x+26 | | -(6x+2y-3)= | | 2x+9=3x+9 | | -75=9n |