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)
60/x = 10/19 // - 10/19
60/x-(10/19) = 0
60/x-10/19 = 0
60*x^-1 = 10/19 // : 60
x^-1 = 1/114
-1 < 0
1/(x^1) = 1/114 // * x^1
1 = 1/114*x^1 // : 1/114
114 = x^1
x = 114
x = 114
| ax^2+6ax=0 | | 45/48=x/16 | | a/115=6/23 | | 15/4=90/k | | 11/5=22/v | | 36/4=n/1 | | c=6-2c-9 | | 39x=215 | | 5(y-b)+3b-6y+4(6+b)=0 | | 78/x=13/11 | | 8y-4=3(y+7) | | 30/w=15/7 | | 2x+x+(60-x)+90=180 | | y=0.2x(1000-x) | | x^5+16x=17x^3 | | 3y+6x-7=5 | | 16x^2-20x-45=0 | | x+200=280 | | a+7=21 | | 3x-56=4 | | 7x+14y= | | 76/4 | | 5+3d=23 | | 4x-17=7x+91 | | 0.07x+0.17y= | | 15+9x=67-4x | | 27/49/3/7 | | 42x+12/48x-6 | | X-2/6=7x+5/2 | | 25x^5-169x=0 | | 2x^2-13x-6=0 | | 7(g-4)=8 |