If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
19*x-4 = 0
5*x = 0
19*x-4 = 0
19*x-4 = 0
19*x-4 = 0 // + 4
19*x = 4 // : 19
x = 4/19
5*x = 0
5*x = 0
5*x = 0 // : 5
x = 0
x in (-oo:0) U (0:4/19) U (4/19:+oo)
12/(19*x-4) = 3/(5*x) // - 3/(5*x)
12/(19*x-4)-(3/(5*x)) = 0
12/(19*x-4)+(-3/5)*x^-1 = 0
12/(19*x-4)-3/(5*x) = 0
(5*12*x)/(5*x*(19*x-4))+(-3*(19*x-4))/(5*x*(19*x-4)) = 0
5*12*x-3*(19*x-4) = 0
3*x+12 = 0
(3*x+12)/(5*x*(19*x-4)) = 0
(3*x+12)/(5*x*(19*x-4)) = 0 // * 5*x*(19*x-4)
3*x+12 = 0
3*x+12 = 0 // - 12
3*x = -12 // : 3
x = -12/3
x = -4
x = -4
| 81/y*3=27 | | a-15=22 | | 7(d-5)+9= | | 3a-12=36 | | -6x+4=-12 | | log(x)+log(x-1)=log(20) | | 15-8x=0 | | 26.8=4y | | 28+112-7+2= | | -17+8=m-5 | | 18a^3b^5+15b^2+5=0 | | 10/3 | | 8x^4-10x^3-4x=0 | | 14y*8=1034 | | 4c^2/1 | | 14y+35=9y+21 | | 3(k+12)=8-4k | | 14y*8=81 | | x-8=-6+9 | | 25x^2=-70x-49 | | 40-15=5(x-4) | | w+[-2.8]=4.3 | | 8w+w+8w= | | 7a+13+8=0 | | 2.53=2.3t | | X^2-8/9x | | 4x=166 | | 9y-2y=-42 | | -23+x=x+25 | | Y=x^2+14x+5 | | 10y+9x=7 | | -1.7=y+6.3 |