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)
8/x = 2/15 // - 2/15
8/x-(2/15) = 0
8/x-2/15 = 0
8*x^-1 = 2/15 // : 8
x^-1 = 1/60
-1 < 0
1/(x^1) = 1/60 // * x^1
1 = 1/60*x^1 // : 1/60
60 = x^1
x = 60
x = 60
| 2n+3.9=7.5 | | log[5](x+5)+log[5](x-5)=1 | | x/12=? | | X^8=27 | | 2(-5)=24 | | ln(6x)=25 | | 2(x-3)+4x+3= | | ax-a=m+mx | | 5x+2(7x+3)=82 | | t^2+6t+2=0 | | 4x-3*4x-3*4x-3= | | y=-0.5x+8 | | 5/4i | | -10x+28=2x^2 | | h=-16t^2+96t-128 | | -1(x)=(3x^2)+6 | | -5(x)=(3x^2)+6 | | graphx+3y=12 | | g(x)=(3x^2)+6 | | 3/4d-11=1/4d-6/1/2 | | 2x+7y+12=0 | | 36/134 | | (sin^-1)(2x)=1/2 | | 6t^2-156=0 | | -3x^2+4y=0 | | sin^-12x=1/2 | | 4i+2h=52 | | 9y+4x=360 | | 9y+4x=270 | | 18=3x-3y | | 0=5-sin(2x)-4*cos(x) | | -x-11(13+4x)=-3(5-9x)+2 |