If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( d )
d = 0
d = 0
d = 0
d in (-oo:0) U (0:+oo)
12/7 = 60/d // - 60/d
12/7-(60/d) = 0
12/7-60*d^-1 = 0
-60*d^-1 = -12/7 // : -60
d^-1 = 1/35
-1 < 0
1/(d^1) = 1/35 // * d^1
1 = 1/35*d^1 // : 1/35
35 = d^1
d = 35
d = 35
| 12(12m-4)=-48+4m | | -8M-5=11 | | r/2-4=12 | | 6t+3=15 | | c-3/2=5 | | 12i-15=31 | | s+4=-8 | | 3-13s=3-8s+s | | 5n=4n-4n | | 2u-2/3u=0 | | -4(4-x)=21 | | log(8x)=2 | | 188=72-x | | 1/4h-3/4h=0 | | (2r+2)/(R+6)=(5R+15)/(2R+12)-(1/2R+12) | | 5v^2-20v=0 | | -6+a/4=-5 | | (1/2t-1) | | (z^8c/x)5 | | 6x^2+10x+5=0 | | -2=n/2-10 | | -6+4/5 | | 2(5+4)=4(a+2) | | (4x^4-17x^2+14x-3)/(2x-3) | | f(x)=3x^3-3x^2+6x | | 22.75/1/4 | | r/8-5=-2-7/8r | | 600x=800x-0.75 | | 0=x^2+5x+40 | | h=-16t^2+48t+448 | | -3n+3-4n=3 | | 6y^4-5y^3-5y^2+5y-1=0 |