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)
9/x = 15/2 // - 15/2
9/x-(15/2) = 0
9/x-15/2 = 0
9*x^-1 = 15/2 // : 9
x^-1 = 5/6
-1 < 0
1/(x^1) = 5/6 // * x^1
1 = 5/6*x^1 // : 5/6
6/5 = x^1
x = 6/5
x = 6/5
| 6-12f=9(-10f+8)+12f | | 2x^8=2x^6 | | 1.5(6-2x)=3x-6 | | -4(x-6)-28=-4 | | 4x-9=9+4x | | (7y-8)-7= | | 100-(-r)=-22 | | [w]=9.2 | | 3x-9y-20=0 | | 3x-93x=14 | | 4w-19=-3 | | 18=3(f+2) | | x/-12=-9(-11) | | 5+x-6=4x-4 | | 3/4x1/3x2/5 | | 12x^2-48x+36=36 | | 9k-6+3k=18 | | 4(b-12)=20 | | You=Stupid+Gay | | 4(14+-.5y)+2y=56 | | 4x^2-Y^2+32x+10y+35=0 | | 5/7=z/2 | | ln(10x-1)=-4 | | v/7.1=0.62 | | 172/10 | | 5g-15g-(-3)=-7 | | 4(5x-1)+6(x-2)= | | 7x-15y=210 | | 4x+9=84 | | 3y-2y+90=180 | | 20=28+c-88 | | -5(3x-1)=2(x-42)13 |