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)
10/30 = 3/x // - 3/x
10/30-(3/x) = 0
10/30-3*x^-1 = 0
-3*x^-1 = -1/3 // : -3
x^-1 = 1/9
-1 < 0
1/(x^1) = 1/9 // * x^1
1 = 1/9*x^1 // : 1/9
9 = x^1
x = 9
x = 9
| 5x^2+2-11-3x^2-8x+7= | | -2y+1=X+3y | | 12=1.5*(45-x) | | -9=a+8 | | 9a-18=3a+30 | | x+60=36 | | -2x-1/4(12x-8= | | -4.3g+15.91=-15.1g-19.73 | | -6(x+3)-17=15+4 | | 0.5w=6 | | 2/3c=2/5 | | 30/12=x/4 | | 12=1.5x(45-a) | | 8n^2-2/9 | | 8h^2-8h-6=0 | | 0=9a+(-2) | | 2(x+4)=2x | | x+45=84 | | 6x-2=22+4x | | 18/x=40/20 | | -7u+2.16=-7.3u | | k-8.5=27 | | 7-4x-8x+5= | | 20x+25y+55= | | x-54=15 | | 12.6r-18.55=-0.6r+13.1r-19.64 | | 3=-25 | | 9x^2+100x+11= | | -2-9=8x+8-7x | | 3/5×1/2×3/4= | | x^2+2.8+1.96=0 | | x+62=0 |