If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
3*x = 0
x = 0
3*x = 0
3*x = 0
3*x = 0 // : 3
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(2-x)/x-((x+3)/(3*x)) = -1/3 // + -1/3
(2-x)/x-((x+3)/(3*x))-(-1/3) = 0
(2-x)/x-((x+3)/(3*x))+1/3 = 0
(2-x)/x+(-1*(x+3))/(3*x)+1/3 = 0
(3*3*x*(2-x))/(3*3*x*x)+(-1*3*x*(x+3))/(3*3*x*x)+(1*3*x*x)/(3*3*x*x) = 0
3*3*x*(2-x)-1*3*x*(x+3)+1*3*x*x = 0
3*x^2-12*x^2+9*x = 0
9*x-9*x^2 = 0
9*x-9*x^2 = 0
9*x*(1-x) = 0
1-x = 0 // - 1
-x = -1 // * -1
x = 1
9*x*(x-1) = 0
(9*x*(x-1))/(3*3*x*x) = 0
(9*x*(x-1))/(3*3*x*x) = 0 // * 3*3*x*x
9*x*(x-1) = 0
( 9*x )
9*x = 0 // : 9
x = 0
( x-1 )
x-1 = 0 // + 1
x = 1
x in { 0}
x = 1
| a+15=23 | | 7(5)-4= | | -11=-77 | | (1/2)X-7= | | -4+9=176 | | 5(1)+2v= | | -3(3+a)=-33 | | 2h+4h=180 | | 104.4=(14+y)5.8 | | 9+3y=-3y+6x | | -204=-17n | | y=-8/3x+9 | | 4(8)-8= | | 0.25x+5=0.35x+5 | | 5(x)+9= | | (2c^2-30c+6)1/6 | | 5(3x+4)=15x-33 | | 1/5x+1/3x=2/3 | | ax-bx+3=5 | | 5y=-45 | | 14x-28=-12-2x | | -2x+4y=10x-8 | | 0.04x+0.03=0.02x+1.05 | | (2x+15)+(4x-33)=90 | | y=-1/2x-6 | | M^2-10=-3m | | -13-1/4h+7 | | 0.5x=x+2 | | 6(3x-4)=5(4x-2) | | 6(x)+4= | | A*4/2=10.8 | | 3(g+4)=12 |