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)
(100*(x-10))/x = 90 // - 90
(100*(x-10))/x-90 = 0
(100*(x-10))/x+(-90*x)/x = 0
100*(x-10)-90*x = 0
10*x-1000 = 0
(10*x-1000)/x = 0
(10*x-1000)/x = 0 // * x
10*x-1000 = 0
10*x-1000 = 0 // + 1000
10*x = 1000 // : 10
x = 1000/10
x = 100
x = 100
| x=((10*x)/9)-100/9 | | -12=-4/3v | | 5y-2(x+3)=15 | | 2(x+4)=5x-10 | | y-9=-4/5*10 | | y-9=4/5*10 | | .10(24-x)+.25=3.45 | | x+5(x+8)=124 | | 2x+62=1012 | | -8+3=-2x+7x | | Y-5y=-2 | | 5.33x-6.16=2.72x+9.88 | | x+(5x(x+8))=124 | | -9w+7w=-19+15 | | 9-5/2?3+4= | | 54-x=896 | | 8/3x=12/5 | | 6z-4=z+6 | | 7+9?6-5= | | 3x=309 | | 2x*x=309 | | -5/8y=-1 | | x+y=1.25 | | x/6-2/3=3 | | 3/7=4/3y | | 3z-1=2+7 | | x-1.25=21?3/7 | | 2x*2=84 | | 6+16x-3=6x+59-4x | | x-11/4=21?3/7 | | 4x+2(2x-2)=92 | | 6+2z-5=8z+1-5z |