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)
y = 27/x // - 27/x
y-(27/x) = 0
y-27*x^-1 = 0
-27*x^-1 = -y // : -27
x^-1 = y/27
-1 < 0
1/(x^1) = y/27 // * x^1
1 = x^1*(y/27) // : y/27
27*y^-1 = x^1
x = 27*y^-1
x = 27*y^-1
| 3(-7)-4y+5(-3)=-1 | | 27/x | | 8(3t-2)=7(t-2) | | 2a^2-16a+252=0 | | 4-2(6t-1)=9 | | -y^2-9y=-5 | | (y+25)8=16 | | 2(3x+2)=2 | | -9x+20y=-25 | | cos(3/x) | | 3(3x+10)=2(5+2x) | | 1+2k=-7 | | (x-7)(x-7)(x+10)(x+3-2i)(x+3+2i)=0 | | -4+8x/2=78 | | 10x=20+5x | | 180=3x+x+75 | | y=-1+-1x | | 6x=25+5x | | 1/5(35x-15y) | | y=-1x-1 | | 4(3x-2)-5(2x-6)=0 | | 3y+x=296 | | 18x/25 | | 4y+6z=12 | | -8x-10y=-30 | | 9/10=108/10x | | 18/5x=3/5 | | ((8/3)/2)^2 | | 2x/21=2/7 | | 0.10x+10=0.35 | | 4=1/2m+3 | | c=5(f{32)/9 |