If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
2*x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
16 = 4-((5*x-5)/(2*x)) // - 4-((5*x-5)/(2*x))
(5*x-5)/(2*x)-4+16 = 0
(5*x-5)/(2*x)+(-4*2*x)/(2*x)+(2*16*x)/(2*x) = 0
5*x-4*2*x+2*16*x-5 = 0
32*x-3*x-5 = 0
29*x-5 = 0
(29*x-5)/(2*x) = 0
(29*x-5)/(2*x) = 0 // * 2*x
29*x-5 = 0
29*x-5 = 0 // + 5
29*x = 5 // : 29
x = 5/29
x = 5/29
| 0=3w^2+20w-45 | | 10y+36=86-10y | | 2y-1=-11 | | X+1.9= | | 12a-14=58 | | 1/5(10x-25)=1/3(15x-6) | | 4x^2+16+252=0 | | 2.5a=17.5 | | 3x+33/6+x+49/7=17 | | -t=19 | | 1.5a=17.5 | | 3x+18+2x-3=50-3x+37 | | f(x)=-x^2+2 | | 12y=2y+10 | | 5/7y-3 | | -3w^2-20w+45=0 | | 289/-17 | | (x/5)-(x/6)=1 | | 7/8b=14 | | g(x)=3x^3-4x-1 | | 1/2x-1/3(x-2)=3x | | y=12x+25 | | 12w=0.0144 | | 39x=7x+4 | | (2/5)x=10 | | 2(m-6n)=-78 | | -5u^2-24u-16=0 | | 10y+36=36-10y | | x+3/8=15/12 | | 49x^2+16y^2+160y-384=0 | | 9u+2-9u+8=0 | | f(x)=x^2+7x+10 |