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)
6/x = 2/28 // - 2/28
6/x-(2/28) = 0
6/x-1/14 = 0
6*x^-1 = 1/14 // : 6
x^-1 = 1/84
-1 < 0
1/(x^1) = 1/84 // * x^1
1 = 1/84*x^1 // : 1/84
84 = x^1
x = 84
x = 84
| 6/x=3/24 | | (-7z+9)+6=5 | | x+29/-9=-6 | | 3/x=6/24 | | h+r=p | | 6/x=24/3 | | 4/5y-8=-4 | | x/25=48/4 | | 9m+1=6m-8 | | (6y-7)/2+8/4=(12y+9)/4 | | 1/49=7x | | 12/4=n/6 | | 7(x-2)=9x+25-2x | | 75/25=n/7 | | 6y-7/2+8/4=12y+9/4 | | y/3.6=15/9 | | 2+7=-36 | | 10-5u-u=2u+1 | | 20/45=11/z | | 6n^3-9n^2-15n= | | 3/4x=7 | | 3n^2-9n-120=0 | | 5x-16=-61 | | 21/70=n/40 | | 10/y=3.2/8 | | -3(2a-1)+5= | | 4y-12-6y=-2y-12 | | 12/18=4/n | | 24/40=30/n | | -6=-3-x | | -1x-x=16 | | 5x-27/-3=-6 |