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)
-8/z = -3.7 // + 3.7
3.7-8/z = 0
-8*z^-1 = -3.7 // : -8
z^-1 = 0.4625
-1 < 0
1/(z^1) = 0.4625 // * z^1
1 = 0.4625*z^1 // : 0.4625
2.16216216 = z^1
z = 2.16216216
z = 2.16216216
| 81=3r-6-6r | | 1/3-1/7 | | 5+a/3=-1 | | 9x-7.5+6.5x=-16.5 | | x/9+4=-5 | | 7m-37=80 | | 6x+20+-14+2x= | | 50000=(190000-X)+.08x | | 2x+6x=x-8+(3x-5) | | 3a+bc-2c=10 | | 8x-5(2x-1)=3x+10 | | v=(1/3)3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201 | | -3-10+3+2y=35 | | 4-8r=20 | | -67+68+(60)+70= | | (5/6)=(3t/5)+2 | | 7(6s-3.5)=-15.5+2.5s | | -52=-42 | | 2c-(c-8)=46-c | | 8-5w=12 | | 3/m-4+4/2m-2 | | 12y+20-15=41 | | -5(-7p-4)= | | 8x-11=4x+9 | | -3(x+2)4x=14 | | 9x-19=3x+1 | | 21(2--2/9)+12(-2/9)= | | -5x-6x=8-8x-x | | x-7+x-7= | | 12y-6y+10=130 | | 3x+6=-5x+30 | | -5(4t-2)+9t=2t-8 |