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)
(4*x)/x-(6/x)-1+2 = 4 // - 4
(4*x)/x-(6/x)-4-1+2 = 0
(4*x)/x-6*x^-1-4-1+2 = 0
-6*x^-1 = -1 // : -6
x^-1 = 1/6
-1 < 0
1/(x^1) = 1/6 // * x^1
1 = 1/6*x^1 // : 1/6
6 = x^1
x = 6
x = 6
| 112=4x-8 | | 2x^2=20x+22 | | 4x+8y-17=0 | | 4X+3(12-2X)=14 | | -8u+15=2u+5 | | 9(a)=-117 | | ((3x-3)/6)+((8x-1)/2)=-37 | | 8(h+2)+6=-8 | | x-0.5=2(0.3-0.2) | | 7(n+9)=3+8n | | 98=3x-17 | | 2(x-3)=4(x+4)-10 | | x-y=wx | | 98=3x+4 | | 5x-(6x+9)=9 | | 7/(x-5)=-35/(x+7) | | 6.5x+1.2x=0.5-0.3 | | 3(y)+4=31 | | 2(x-4)=52 | | 7x+18=6x+9 | | 3/4x+4/3x | | (2x+3)/(x-6)=5 | | 11x+9=3x-7 | | 7(y-5)=14 | | 13-3d=1 | | 22=32z-4z+8 | | (x+6)=21 | | (6x-1)/5=13 | | 114=2(2[x+6]x) | | 34=2x-12 | | 3=-n+23 | | 3=-n+23 |