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-4) = 5 // - 5
4-(4/x)-5 = 0
4-4*x^-1-5 = 0
-4*x^-1 = 1 // : -4
x^-1 = -1/4
-1 < 0
1/(x^1) = -1/4 // * x^1
1 = -1/4*x^1 // : -1/4
-4 = x^1
x = -4
x = -4
| 9-5n=39 | | 16i+5=3oi-2 | | .5x+8.5-15=-3 | | 5y+5=4z+9 | | 1.33t-8=-12 | | x+17477=1345676543427 | | (7x^2-22x)/(7x-1) | | 7b+6a=69 | | 18=m/3 | | 5.19-1.54x=4x-1.735 | | 10=8-k | | -13r=260 | | 1739183*82918391= | | A+A+6=42 | | 0.22m-3=24 | | 6s-5-4=-29 | | 18v=342 | | Xy-2x+y=2 | | 5.17x+5.61=3.3x | | 2x+5(4x+y)=-13 | | N-3+7=5 | | |x/7|=18 | | 22x+5y=-13 | | 2x+16-3x=45 | | 4X^2+12x-7=0 | | 1.2x+6.2=3.5x-3 | | 16+2n=36 | | x^2-4x+4=2x-1-x^2 | | 74+12xn=52 | | 16y-15y=14 | | |-1/2-2|=10 | | 4x+3x-4+x=180 |