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)
3*x-(2*x)-(4/1) = x-(13/x)+7 // - x-(13/x)+7
3*x-(2*x)-x+13/x-(4/1)-7 = 0
3*x-2*x-x+13/x-7-4 = 0
13*x^-1 = 11 // : 13
x^-1 = 11/13
-1 < 0
1/(x^1) = 11/13 // * x^1
1 = 11/13*x^1 // : 11/13
13/11 = x^1
x = 13/11
x = 13/11
| (1/8x^4+5/8x^3+3/8x^2+6)+(-5/8x^4+5/8x^2-6) | | -5x+10=30-3x | | (x+-4)(x+-4)=-7 | | 120+2N=340 | | 2c+6+3c+4+0.5x+5=180 | | 4-4x-3-2x= | | 5x-3=12+2x | | 6z-14=3z-5 | | 2x+6+3x-16+x=180 | | -52+4x=38-x | | .5k-4=7 | | 4x-4=0.5x*-4 | | 16/40=22/x | | 2r+6/4=5r-5/5 | | 7x^2*y+8xy^2=-8 | | -6(-4b+3)= | | -5x-10/2=10 | | 24.22=3.4-5.7 | | 2x+6+3x-16=180 | | N/5-8=22 | | 8x+5y=96 | | x^2=8x-23 | | -3/2+x=5/6-3/4 | | 6x+30=70 | | 2x-6+3x-16+x=180 | | 19.25+.3y=35 | | 12x-10=9x | | 10a+5a-6a= | | -73+9x=x+151 | | r^2=28-2r | | -8x+4y=16 | | 6+3t=-14 |