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
4*x = 0
x = 0
x = 0
4*x = 0
4*x = 0
4*x = 0 // : 4
x = 0
x in (-oo:0) U (0:+oo)
(x-4)/(4*x)+1 = (x+4)/x // - (x+4)/x
(x-4)/(4*x)-((x+4)/x)+1 = 0
(x-4)/(4*x)+(-1*(x+4))/x+1 = 0
(x*(x-4))/(4*x*x)+(-1*4*x*(x+4))/(4*x*x)+(1*4*x*x)/(4*x*x) = 0
x*(x-4)-1*4*x*(x+4)+1*4*x*x = 0
4*x^2-3*x^2-20*x = 0
x^2-20*x = 0
x^2-20*x = 0
x*(x-20) = 0
x-20 = 0 // + 20
x = 20
x*(x-20) = 0
(x*(x-20))/(4*x*x) = 0
(x*(x-20))/(4*x*x) = 0 // * 4*x*x
x*(x-20) = 0
( x-20 )
x-20 = 0 // + 20
x = 20
( x )
x = 0
x in { 0}
x = 20
| 2p^2-12p-16= | | factorx^2+15x+56=0 | | n+(n+1)+(n+3)=105 | | -18y=+24 | | 5.4=y/1.4+2.3 | | 8(x-3)=8-24 | | y/-2y+5=12 | | -5=x+11 | | 12.5+1.9x=-35.3 | | 4y^2-100y+3=0 | | (x/3)=3+((x-25)/5) | | -(2/5)x=(1/5) | | (x/3)=3((x-25)/5) | | 3(30+1x)=4(1x+19) | | (2/11x)=12 | | 11x-(4x+3)+13=5x | | x(x+5)=x*x-15 | | 20/0.1 | | 6+3p-4=9p+3-5p | | 2/9-7/5= | | 3x+2+1x=-(1x+2)+3 | | 20x+10=40 | | 4(2^3x)=1/16 | | -152=8t | | d-2=4d-6 | | 10p+4=8p+16 | | ((x+5)/16)=(9/8)+((x-6)/4) | | 5(x+2)=7+5x | | -3x+81=81 | | 36=x^2+x^2 | | 12=3d-6 | | 13.8=2.7x-7.8 |