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)
(1/3)*x+4/x = 9 // - 9
(1/3)*x+4/x-9 = 0
1/3*x^1+4*x^-1-9*x^0 = 0
(1/3*x^2-9*x^1+4*x^0)/(x^1) = 0 // * x^2
x^1*(1/3*x^2-9*x^1+4*x^0) = 0
x^1
(1/3)*x^2-9*x+4 = 0
(1/3)*x^2-9*x+4 = 0
DELTA = (-9)^2-(4*4*(1/3))
DELTA = 227/3
DELTA > 0
x = ((227/3)^(1/2)+9)/(2*(1/3)) or x = (9-(227/3)^(1/2))/(2*(1/3))
x = 3/2*((227/3)^(1/2)+9) or x = 3/2*(9-(227/3)^(1/2))
x in { 3/2*(9-(227/3)^(1/2)), 3/2*((227/3)^(1/2)+9)}
x in { 3/2*(9-(227/3)^(1/2)), 3/2*((227/3)^(1/2)+9) }
| 12a+21*2a=378 | | 1/8(16m-8)-17 | | x^3+8x^2+11x-2=0 | | 90(x)=50+10x+2x^2 | | 12(x+4)-(9x+3)= | | 16a^5+24a^3= | | 8x-3x+2x+15= | | 2x-2=4x+8 | | 3/5x+19-3/20x-7 | | 2x-2+4x=8 | | 9(x-5)+7(x+3)= | | x^2+10x+25-3x+15-10= | | -4/9x+4=0 | | x^2+10x+25-3x+15= | | 9(x-5)+(x+3)= | | 2x-7=101 | | 67=x+(x+5) | | p^3-p^2= | | 7-64=54+29 | | 5x+2(x+8)+3= | | 5x+3-4x=10 | | 5+4x=2x+11 | | 48+x=180 | | 4x^3/4x+3 | | 4(y+1)=3y-6 | | y=-4/9x+4 | | 85+x=180 | | -1-2x+x=-13 | | -102-10x=10x+8 | | 8x^2+6x= | | 3.3x+159(.1666666667)=1000 | | x+85=48+x |