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)
28/x = 2 // - 2
28/x-2 = 0
28*x^-1 = 2 // : 28
x^-1 = 1/14
-1 < 0
1/(x^1) = 1/14 // * x^1
1 = 1/14*x^1 // : 1/14
14 = x^1
x = 14
x = 14
| 21r^2-52r+7=0 | | 3b-22b+7=0 | | 5+ln(x+3)=6 | | x^4+14x+49=1429 | | 14x+8y=48 | | 2*x*x+5x+6=y | | -5u^2+17u-6=0 | | x^4+14x-1380=0 | | 3x+44+158-4x=180 | | 19/x=1 | | 4x+8-2(-6x-1)=2(x-1) | | 56c^2+23c-63=0 | | 13-y=-6 | | (x+20-30i)(x+20+30i)=0 | | 9y+6=5y-6 | | 9y+5y= | | X^2-2/9=0 | | 2-z=-14 | | (3/8)x(-1/3) | | -5(u+3)=3u-1+2(3u+2) | | 3x^7+3x=3x | | m(15-m)= | | 3Cos^2(x)+5cosx+1=0 | | 6p-2t-4p+1t= | | 8x-2x+2x= | | 4x+2y=3x+4-6y | | 3x+4x+3y= | | X^/-2x=0 | | 8[(12x1/2-3x-3)2-10]= | | 22-9x=y | | 3xy+4=2xy+4x | | 5z-3=2(2-3) |