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)
3/9 = 6/n // - 6/n
3/9-(6/n) = 0
3/9-6*n^-1 = 0
-6*n^-1 = -1/3 // : -6
n^-1 = 1/18
-1 < 0
1/(n^1) = 1/18 // * n^1
1 = 1/18*n^1 // : 1/18
18 = n^1
n = 18
n = 18
| 6x43/8 | | x/11=12/6 | | -6x+-1x+-7x=10+15+-5 | | 5(1-6b)-6=89 | | y-2y=64 | | 7ab+7a= | | 2x+(7-2x)+y=10 | | 3/r=12/5 | | -3(2x+7)=11 | | t-(-7)=-1 | | (X+y)(x-y)=7 | | 21+2.5h=11+3.75h | | 6t-1-10t=51 | | 7(6-4p)-8=1+5p | | t-(-7)= | | 3(x+31)=3x+123 | | -3(p-6)=4-5p | | 8*0-7= | | 49+x+x= | | -7(1+6a)=-4a+31 | | 1y+3=17 | | (3x+3x-3)-(6x-4x-2)= | | 2(5-d)=2-2d | | 4x-c=kforx | | x+4(3x-2)=-24+5x | | 8*0+7= | | 3m-6n=1 | | 8n+16=6n+24 | | -57-5x=3x+39 | | 140=4(5x-5) | | 6x-4/9= | | -11x-14=-9x+32 |