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)
6/x = x // - x
6/x-x = 0
6*x^-1-1*x^1 = 0
(6*x^0-1*x^2)/(x^1) = 0 // * x^2
x^1*(6*x^0-1*x^2) = 0
x^1
6-x^2 = 0
6-x^2 = 0
DELTA = 0^2-(-1*4*6)
DELTA = 24
DELTA > 0
x = (24^(1/2)+0)/(-1*2) or x = (0-24^(1/2))/(-1*2)
x = -6^(1/2) or x = 6^(1/2)
x in { -6^(1/2), 6^(1/2)}
x in { -6^(1/2), 6^(1/2) }
| 5y=3(-2)+6 | | 2+1.5x=y | | w/15-26=42 | | 2x+12=1000 | | 8z+18=2(2z-9) | | -8x-9+7x=-2 | | -4(3n+5)=12n | | 9-c+9= | | -4(1-6x)-24x=-22 | | y=8(.2)+12 | | 104a+224b= | | 0.25*X=17 | | 4x-(1/2)x^(-1/2) | | 9n-3=2n+46 | | 2h=7 | | 5x+3xy=4y+15 | | -31/2=-1/2 | | -8x+12=2x+10 | | 5x-2(10x-3)=4(7-5x)-35x+2 | | 5/6(12x+24)=-13x+4 | | 18x+1/2= | | 16n=19n | | (x-1)(x-1)+5=0 | | 27a^3/19b^21 | | 120(15-x)=180(x) | | Y=x^3+6x^2-9x-11 | | 3x+7(3x-7)=71 | | 6x+6=3+8x-7 | | 3/4x-9/513/15-1/4x | | 0.10x+0.05(2-x)=0.10(-8) | | 5x-3-x-4x=10 | | 2(2x-3)=26 |