If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/8 = 2.5/x // - 2.5/x
5/8-(2.5/x) = 0
5/8-2.5*x^-1 = 0
-2.5*x^-1 = -5/8 // : -2.5
x^-1 = 0.25
-1 < 0
1/(x^1) = 0.25 // * x^1
1 = 0.25*x^1 // : 0.25
4 = x^1
x = 4
x = 4
| 408/17 | | -b-10=8 | | n(n+1)(n+2)(n+3)(n+4)=0 | | (679-700)/700 | | (7x^2)=3x+39 | | -6=x/2-6 | | 3x-20/4 | | 1/6t=3-5/6 | | 2-9x=-43 | | 4(-1)-(y-5)=10 | | K-5=10-4k | | (2x-30)=82 | | 7x-3=9(x-1) | | 6v+3=33 | | 14k+35=11k+94 | | 10x-3=10x+8 | | 679-700/700 | | 27=-3c | | 12b=-243 | | 6p^6=-54p^4 | | 10(m-3)=400 | | -6p=-5p-3 | | 18w-13w-4=11 | | 1+3x-12=2x-12-(-8) | | 6=0.2n | | -9x-3/4=x | | 2(7x)=3x+39 | | 14p=56 | | -16+9m=65 | | 5+x=-14 | | 3.4=-t/3.5 | | 18(2.5)+-45=0 |