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)
4/m-7 = 9/10 // - 9/10
4/m-(9/10)-7 = 0
4/m-9/10-7 = 0
4*m^-1 = 79/10 // : 4
m^-1 = 79/40
-1 < 0
1/(m^1) = 79/40 // * m^1
1 = 79/40*m^1 // : 79/40
40/79 = m^1
m = 40/79
m = 40/79
| 24y+3y+8=0 | | 0=-16t^2+4t+450 | | (7a+2)+(a+3)= | | y^2-10y+11=0 | | 6.5e-6=.2x+2x^2 | | (3b-1)-6(b+5)= | | -2w=7 | | 40=-b | | 4z+1.5=2-3 | | 4x-2+11=x-3+12 | | -5+10y=9y | | 9-9w=-8w | | 2y/2=-54/2 | | 7x-12+4=-2x+10x+3 | | 60=(5x+20) | | -8h-4=-5h-10 | | -w+17=183 | | 41=14y | | 2(x-6)+3=4-(x+2) | | 17X=132M-5X | | 68=165-x | | -8b=-6-5b | | 4x-6=-18-2x | | 16=-y+248 | | 8ln(4x)=40 | | .4x-4=.6x-1.4 | | -111=-1-10 | | 4x-2x+11=x-3+12 | | (2x^2+6x+1)+-(7x^2+2x-3)= | | 4x^5+1=129 | | 5+2g=1 | | 3(10x+5)+2x=271 |