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)
200 = 1.1*x*(10-(27/x)) // - 1.1*x*(10-(27/x))
200-(1.1*x*(10-(27/x))) = 0
200-1.1*x*(10-27*x^-1) = 0
200-1.1*x*(10-27*x^-1) = 0
229.7-11*x = 0
229.7-11*x = 0
229.7-11*x = 0 // - 229.7
-11*x = -229.7 // : -11
x = -229.7/(-11)
x = 20.88181818
x = 20.88181818
| a^2+4ab+3b^2=15 | | 24/4/2 | | x^3-6x^2+12x=-208 | | x^3+6x^2+12x=-208 | | 4x^2+20=10+35x | | 4x^2+20=18+35x | | 4x^2+20=18+35 | | 5x^2-180x+4=0 | | F(x)=x^3-7x^2-5x+11 | | y=-4x^2-24x-29 | | 2x-4/15*9/3x-6 | | 3/4*x=1/3 | | 4/9÷6 | | x+y+3=18 | | 3/4*x=1/2 | | (2+(2+x)(2+x))(2+(2+x)(2+x))=2016 | | -6(r+6)-4=-86 | | 7x+3y=77 | | (3x/4)=(1/2) | | x=(1/8)/3 | | -87=5(7-4x) | | x=(1/2)/4 | | 32x-10*3x+9=0 | | (11/4)x=3 | | 2x+3+2x+1=80 | | 3x=(1/2)/(4/1) | | 1/2t-1/3t-1 | | X*8=260 | | 6(2x+1)=-38 | | 1-2sinx=2 | | 12y+8=56 | | 24x-16y=7 |