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)
4/z-3 = 0
4*z^-1 = 3 // : 4
z^-1 = 3/4
-1 < 0
1/(z^1) = 3/4 // * z^1
1 = 3/4*z^1 // : 3/4
4/3 = z^1
z = 4/3
z = 4/3
| -3x-76=54-8x | | 5-3(x-9)=1/2(2-x) | | x/4.1=5.5/5.3 | | -4+17-3-18= | | y=-2x^2-7x+2 | | -6(1-3n)=27+7n | | -9-4n=-3(2n+1) | | x/6.2=2.5/2.7 | | 5/6h=420 | | 3z+13=13+3z | | 12(0.2)+9=6-3(0.2) | | 1/14i | | -1+-5a=30a+4 | | 3c^2=361 | | 2m-5(1-4m)=-37+6m | | -9-4=-3(2n+1) | | 180=2x+65 | | 4(2m-1)+3m=18 | | x/8.1=2/2.8 | | 3b=5/1/2 | | -8x-38=50-12x | | 42-0.2x=40 | | -3r-8+7r=34+9r-2 | | 400-7+40-100= | | 3/10x(-1/4) | | x^2+56x-510=0 | | 2v-8(1+7v)=40-6v | | 5.8/x=3/2.8 | | 2m-3/2m | | 3y-6+x=1 | | 5.6q-3.2-5.1q=-0.5q-4.8 | | 5.8/x=3/2/8 |