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)
12/x = 6/4 // - 6/4
12/x-(6/4) = 0
12/x-3/2 = 0
12*x^-1 = 3/2 // : 12
x^-1 = 1/8
-1 < 0
1/(x^1) = 1/8 // * x^1
1 = 1/8*x^1 // : 1/8
8 = x^1
x = 8
x = 8
| 4n^2+25n-20=0 | | (4x+11)-6= | | 9x=4x-25 | | 0.8*p=8 | | 8+8x=4x | | 5.5+p=54.5 | | 5.5p=54.5 | | 2x+11=6x-13 | | 5y-3=14y+60 | | f(x)=-8x^2+8x+7 | | -90=18y | | 1p+26.5=42 | | d=1/2n^2-3/2n | | x^2-5/3x+c=0 | | (x-3)/2 | | 5.25*p=105 | | R^3/T^2=K | | 18.10p=45.25 | | 3x+4-4=1-4 | | x^2-3=(x-3)/2 | | 900-4x=300+4x | | x^2-7xz-30z^2=0 | | (2-(4/9)^(1/2))/(1*2) | | ((4/9)^(1/2)+2)/2 | | 8.5+p=15 | | 2(-4x+5)=26 | | -6x-1=f(x) | | (4/9)^(1/2)+2 | | 3(x+1)=42 | | 11-(x+8)=4x-2 | | 8x+20-9x= | | 26.5+p=42 |