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 = 0.75 // - 0.75
9/x-0.75 = 0
9*x^-1 = 0.75 // : 9
x^-1 = 0.08333333
-1 < 0
1/(x^1) = 0.08333333 // * x^1
1 = 0.08333333*x^1 // : 0.08333333
12.00000048 = x^1
x = 12.00000048
x = 12.00000048
| 3x-2+6x+3=x | | k(5)=6(5)+100 | | 2(4x-3)=4+7x | | x/9=64/72 | | 2x-5=8-x | | 7x^2+0.5x=0.01 | | K-5=-7 | | 5b=b-6 | | bx+by=z | | 3x+y-2z=-2 | | 255/420 | | 36=3(8x+6)+6 | | I/5-3=1 | | 6w^2+18=0 | | 36=-3(8x+6)+6 | | 3/5*44 | | s^2+4s-117=0 | | (5x^2-3x)(3x+2)=0 | | 4x+3y=69 | | 17x-58=180 | | -6w+3(w-7)=-12 | | 7y-5=6y+10 | | 45x^2-90x-20=0 | | 3(y+8)-6=21 | | 4x+3+113=180 | | 45-3+7x-15=42 | | 5(1+6v)+4v=-63 | | 46-3+7x-14=42 | | 1.7(14r+28)=2(r+2) | | 76=3x-2 | | u^2-8u+42=0 | | -7n-3n=-20 |