If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
0.1-x = 0
0.1-x = 0
0.1-x = 0
0.1-x = 0 // - 0.1
-x = -0.1 // * -1
x = 0.1
x in (-oo:0.1) U (0.1:+oo)
3.9/(0.1-x) = 60 // - 60
3.9/(0.1-x)-60 = 0
3.9/(0.1-x)+(-60*(0.1-x))/(0.1-x) = 0
3.9-60*(0.1-x) = 0
60*x-2.1 = 0
(60*x-2.1)/(0.1-x) = 0
(60*x-2.1)/(0.1-x) = 0 // * 0.1-x
60*x-2.1 = 0
60*x-2.1 = 0 // + 2.1
60*x = 2.1 // : 60
x = 2.1/60
x = 0.035
x = 0.035
| 53=3v+11 | | 7a+6=-8+14 | | 3x^2-30x+4=0 | | 100g+7=15 | | 2x+5=9-4x+20 | | 11-4x+7x=8x-4 | | 4x+2=(x-1)(x+3) | | 2.4n=3.6n | | 57=4x+13-8 | | 5t-14=25-8t | | 2x^2+15x-56=0 | | 9x-16=8x+13 | | 3y+12=-2y-3 | | 2w+10=5w-14 | | 21k-14k+4+2= | | x+0.10x=592.90 | | 8g-4=12g-5 | | 120=-16t+96t+12 | | 6c+14=4c | | 5x+9(1.05)=16.95 | | 5d=3d+40 | | x+0.5x=764.40 | | 12.75-5y+9y=16.95 | | 2x-18=2+3x | | -3x+2y=-16 | | x-7+17=5 | | y=2x^2-15x+18 | | .0275=logx | | y^2+5y=4 | | 14=×/5 | | 8.75/2 | | -4x^2+3x+7=0 |