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)
8/12 = 6/x // - 6/x
8/12-(6/x) = 0
8/12-6*x^-1 = 0
-6*x^-1 = -2/3 // : -6
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
| 9y+8y+11=12-2 | | 4n-5=-8 | | (19b-7)-6(3b+3)=-4 | | 2+9x=10+x | | 5x+24=(-36) | | 17sin(x)=6cos^2(x)-13 | | 14s+6c+15=13s+14c | | 4x/2x-2 | | m^2-(1/3)m-(2/9) | | 6sin^2x+17sinx+7=0 | | 20x+4=78+8x-2 | | 3x-23=37-2x | | h=0.1d^2+0.1d+3 | | 60-y=230 | | 4x+2=3x+14 | | 1/3(7x)=1/4(10x-2) | | x^2-10x+26=2 | | 6/10=10x | | 6x+15+=6(x-3) | | 2sin^2x=3-sinx | | 8x-17=3x+7 | | 5/16=x/11 | | 6/x=0.5/3 | | 8x-2=5x+22 | | 3u=18.75 | | (7x-55)2=54 | | v=vz | | 7b+3b=30 | | N+8n=d | | 21n^2+34n-35=0 | | 12x+4-8x=2(2x+2) | | 16a^2-40b= |