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)
20/150 = 3/x // - 3/x
20/150-(3/x) = 0
20/150-3*x^-1 = 0
-3*x^-1 = -2/15 // : -3
x^-1 = 2/45
-1 < 0
1/(x^1) = 2/45 // * x^1
1 = 2/45*x^1 // : 2/45
45/2 = x^1
x = 45/2
x = 45/2
| 4(x+1)=2+5x | | x^2-4x+5=kx-4 | | 6x-27=23+8x | | p+6+p=p+42 | | 6y+-4+3y+1=12 | | 9(k-4)=4(3) | | 2x^2+15=23 | | 46545515151515-15545554= | | -a-2a=-6 | | 4ln(5-3x)+1=9 | | c+14+c+10=c+44 | | 2x-74=-4x+76 | | 6/3=-9m | | y+y=y+45 | | 0.25x+20=-0.5x-4 | | (2+5i)(3-2i)= | | s-25+s+6=s+40 | | 4z-1z= | | 8(0)-5y=-11 | | Log(5x+1)=1+log(x-9) | | 5+6+11x+9x= | | 19+1.5x=15+2.75d | | 4=-12-4r | | t+1+t-50=t+40 | | (6x-2y-5)-(-5+9y-8x)= | | 68=4x+28 | | 18+7n-12+5n= | | 1.5t-34=26 | | -2x+15=4x+39 | | 5x^3-13x=6 | | 3(5+-1.5)-10y=15 | | 280x=420 |