If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
100-x = 0
100-x = 0
100-x = 0
100-x = 0 // - 100
-x = -100 // * -1
x = 100
x in (-oo:100) U (100:+oo)
x/(100-x) = 0.33 // - 0.33
x/(100-x)-0.33 = 0
x/(100-x)+(-0.33*(100-x))/(100-x) = 0
x-0.33*(100-x) = 0
1.33*x-33 = 0
(1.33*x-33)/(100-x) = 0
(1.33*x-33)/(100-x) = 0 // * 100-x
1.33*x-33 = 0
1.33*x-33 = 0 // + 33
1.33*x = 33 // : 1.33
x = 33/1.33
x = 24.81203008
x = 24.81203008
| y=5mx-4b | | 7x-14=-42 | | 5(2-x)+3(x+6)=10+4(2x-6) | | x/(100-x)=0.37 | | 2(4x-1)=x+23 | | x/(100-x)=.37 | | x/(100-x)=0.25 | | n-4=-4+2n | | -3y+6=-2-y | | 0.1-0.200x=x^2 | | 3b-4-11b-7= | | 2x-50=4x+20 | | 7sqaure=49 | | 3(y-2)+3y=54+2y | | 5x=3y-15 | | 4f+15=13f-3 | | 3y^2-15y+4=0 | | 5(4x-7)-3(x+4)-19x= | | 8=5/6(x-4) | | 1-3z=-7-7z | | 8y-4=4y+6 | | 12/29=x/100 | | 10x-4=x-5 | | 10x-7=4x-5 | | 4(2y+1)=2(12-y)# | | X/21-3 | | 3(j-3)=-18 | | 6+2b=3b-13 | | -6y+8=-8y+-2 | | X^6+x^4-7x^2=0 | | 5a-7=-5a+13 | | 5[12-(6-3a)-2a]=2(1-9) |