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/x+8+11 = 0
5*x^-1 = -19 // : 5
x^-1 = -19/5
-1 < 0
1/(x^1) = -19/5 // * x^1
1 = -19/5*x^1 // : -19/5
-5/19 = x^1
x = -5/19
x = -5/19
| 16999+1-3=26+8 | | -8/10=y/5 | | 3x^4-17x^2-56=0 | | 14d-19d-7d= | | 1/5(2x-9)=3 | | 0.21x+525.00=0.13x+585 | | 5+26-8=2+2 | | 257x=19 | | 15/2-1/2= | | 5x^2+12x-11=0 | | y-2=-6/2(x-6) | | 2+8=8+x | | 7x-3x-18=-2 | | 14x^2y-10xy-18x= | | -4-(3/8)x=26 | | -1=-2(x) | | 8(r-12)-3r=-r-3(r+8) | | 5+(-15)+20= | | 2x+1xy=3y | | v=pi(9x)+8 | | 7*3+y=7 | | v=9x+8 | | 6xy+2x-3y-5xy=0 | | y-6=-4/7*14 | | u^2=3u+10 | | 2-4x=-3 | | 2*9+9x=-18 | | 2y+9*-2=-18 | | 1-(5/2)x=16 | | 2y+9*9=-18 | | 2y+9x=-18 | | 2*-2+9x=-18 |