If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
6/n = 8/12 // - 8/12
6/n-(8/12) = 0
6/n-2/3 = 0
6*n^-1 = 2/3 // : 6
n^-1 = 1/9
-1 < 0
1/(n^1) = 1/9 // * n^1
1 = 1/9*n^1 // : 1/9
9 = n^1
n = 9
n = 9
| 7b-15=5-3 | | 30(12)=9x+9 | | 3k^2+23k-23=0 | | 5-4y=1 | | y=A(x+3)(x-4+5i)(x-4-5i) | | (2x-25)+(2x+17)+(x+13)=180 | | -9x+4=58 | | 5x^2+-19x-4=0 | | 21=-3e | | x^2+-19x-4=0 | | 6-7x=-8 | | 7+7x-4x=10 | | 157-3x=5x+85 | | =49x^2+4 | | 1+4x-6x=-13 | | A=0.5h(c+d) | | -4+3a=5 | | 7y+7=7 | | -81=-7x-3x-1 | | 14-2x+6=12 | | x-2x+4=7 | | (x-11)+(2x-7)+x=180 | | 8+5x+3x=-16 | | 4(2x+9)=-20 | | x+(2x)+(2x+15)=135 | | (x-11)+(2x-7)=180 | | 9+x=2+5x | | 6-5x+3x=-8 | | 10x+x=180 | | 6/5y-18=-30 | | 7(4w+8)=1 | | 14=x+6x+7 |