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)
w/h = 1-(t/x) // - 1-(t/x)
t/x+w/h-1 = 0
t*x^-1 = -(h^-1*w-1) // : t
x^-1 = (1-(h^-1*w))/t
-1 < 0
1/(x^1) = (1-(h^-1*w))/t // * x^1
1 = x^1*((1-(h^-1*w))/t) // : (1-(h^-1*w))/t
1/((1-(h^-1*w))/t) = x^1
x = 1/((1-(h^-1*w))/t)
x = 1/((1-(h^-1*w))/t)
| 4x+12x=90+18 | | 3(x+9)=12y+13 | | 2X+24x=105 | | x^3-90x+105=0 | | x+x^2+x^3=2036 | | -10(9)2=p | | -x-16=2x+2 | | x/3-5/6=3x-9/12 | | 1+3n=-3+5n | | 120--3/4y=60 | | 20=6+2p | | 3x-15=-7-11 | | 2w-(4/5)=(-6/5)w-(3/2) | | 1/4a= | | (4-10i)+(7-3i)=0 | | n-8+n=-12 | | 450+20x=25x | | 8x-5=-48 | | tan54=14/x | | 2x-3=11x | | -x+24=3x+4 | | 10/a=6/8 | | b+2-7=-6 | | x^2+9x-50= | | -8x+5=48 | | 3P/2=15 | | rad[2x^2-2]=x-1 | | -17+4n=7(5n+2) | | 10x-170=5 | | Sqrt[2x^2-2]=x-1 | | 40x-800=5 | | x-1+8=12 |