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)
30/z+275 = 1225 // - 1225
30/z-1225+275 = 0
30*z^-1 = 950 // : 30
z^-1 = 95/3
-1 < 0
1/(z^1) = 95/3 // * z^1
1 = 95/3*z^1 // : 95/3
3/95 = z^1
z = 3/95
z = 3/95
| x+5+4x=180 | | 9x+4=3x-20 | | [(-6.3)-7.5]-(6.9-4.2)= | | 2x^2-4x+8=y | | 4x5/2 | | -90*(-40)= | | 12x+25=133 | | -0.9x-2.6=5.4+1.1x | | -2p+8=6-(-10p+5) | | 5y^2-y+6=0 | | 15+0.5m=25+0.25 | | f(0)=4x-2 | | 6(n-6)=0 | | -2p+8=6-(-10+5) | | z+3/z-9=10/-7 | | 5y-y+6=0 | | 45=-3.6c+189 | | 12y^2+100y-72= | | 7a-19=44 | | (X+3)(12y^2+100y-72)= | | 8-12p+8=6-(-10p+5) | | Q=20-5P | | 6=4x-2y | | Y=3-0.5(x-2) | | Y=3-0.5x-2 | | 5+4m-4=8m+15-2m | | 1/2(82-4d)+4(30+d)=241 | | P=3.50*5.50+6 | | 4x^2-25x+38=0 | | 3(x+1)-2y=0 | | 10(-2+3)-(18-4)=-2-5+3 | | 0=4.9x^2+5x |