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)
9.9/17 = 69.3/x // - 69.3/x
9.9/17-(69.3/x) = 0
9.9/17-69.3*x^-1 = 0
-69.3*x^-1 = -0.58235294 // : -69.3
x^-1 = 0.00840336
-1 < 0
1/(x^1) = 0.00840336 // * x^1
1 = 0.00840336*x^1 // : 0.00840336
119.00001904 = x^1
x = 119.00001904
x = 119.00001904
| 690+-255= | | 26+3b=9(5b-7) | | 8x^2-4x^2-9=0 | | 6+6x-3=9x+14-7 | | 4x+1+2x+23=40 | | 17=9+3(a+8) | | 10.8n-9.8n-5.1=-5.2 | | Mk+nm=gs | | x^2-2x-1=8 | | x^3-64=(x+a)(x^2+bx+c) | | 17/x=119/21 | | Y=-7X+18 | | 4.5s-3.6=2.5s+4.8 | | 6+6x-3=9x+14-17 | | 3x+2x+3x+4x=360 | | 3b-9-2b+6=2b-3 | | 69=9-5P | | y=18x^3-2x^2+27x-3 | | (-397)(8)= | | 2=3-2t | | 10x-5+12x-7=90 | | 8c-2c=16 | | 3x-4-12=-12 | | 9v-8+2(2v+6)=-2(v+7) | | 8c-2x=16 | | -8+6g=16 | | y^3/2-216=0 | | 17/x=34/6 | | -x-8x+20=0 | | 7+x=14+18 | | 8x+5+3y+14=180 | | 19x+85= |