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)
12/x = 1/100 // - 1/100
12/x-(1/100) = 0
12/x-1/100 = 0
12*x^-1 = 1/100 // : 12
x^-1 = 1/1200
-1 < 0
1/(x^1) = 1/1200 // * x^1
1 = 1/1200*x^1 // : 1/1200
1200 = x^1
x = 1200
x = 1200
| 18−6z^2/6−2z^2 | | 4x^3-3x^2-6x+12=0 | | z(3z+11)=20 | | 1.5x+7=17 | | 1/2m-3/4n=8 | | (9/4)(7/X) | | P-11=14 | | (9/4)/(7/X) | | 158y=y*x | | 6(x+4)=-36 | | 5m^2m/7m | | 2x+5x*0-5x=360 | | 8-x+3x+x=102 | | 4x-34-x=-4 | | 14t-7t=-56 | | 4x-34-x=4 | | T-23=8 | | -10=13-x | | 2x+-5x=360 | | 4(9)+3y=3 | | 3(w+1)+7w=4(w+1)-7 | | 6x^7-12x^3+9x^6= | | 5x+3(x+7)=11-(2x+5) | | -7+e=9 | | 2x-5x=360 | | 6y-12+1=6y-10 | | 3*x=8/3 | | 75/50=x/10 | | 3(4-2x)=-24 | | 20m^2-5=0 | | 6(x+5)-(3x-7)=0 | | x^2+6*x-40=0 |