If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
3.5/m = 16 // - 16
3.5/m-16 = 0
3.5*m^-1 = 16 // : 3.5
m^-1 = 4.57142857
-1 < 0
1/(m^1) = 4.57142857 // * m^1
1 = 4.57142857*m^1 // : 4.57142857
0.21875 = m^1
m = 0.21875
m = 0.21875
| 8=-3/4*2+b | | 25=2x-15 | | 3x+4(x-8)-x=3/5(10x+15) | | 7(x+3)-2x=5(x+1)+16 | | (-8x^2+8x)-(9x^2+12x-4)=z | | 1/4*9 | | (2x+5)-(-4x+8)=z | | x-33=42 | | 20-4y=-20 | | (3a^5+8a^2-3)-(6a^5-6a^2+18)=b | | 3/x-5/(x-1)=0 | | 5/8a-27=-7 | | x(2)-4=12(2)-x | | 2.17-0.54x=5x-5.309 | | (8x+2)+(-9x+7)=z | | 1/4m+9=-16 | | 45=20-5x | | x(2)-4=12 | | 10+12p=9+12p | | x(2)=16 | | 25y=625 | | (7x+1)+(7x-9)+(10y-2)=180 | | n/8=18.5/1 | | (-x^3y^2+2)+(5x^3y^2-6)=z | | x+2x+x+70=180 | | (a^2b^2+7ab)+(6ab-a^2b^2)=c | | (x/2)+3=14 | | 22-7=u | | 3/x-1/x-1=4/x-1 | | 0.20x=18 | | x/2+3x=14 | | 22d=7 |