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)
6/15 = 2/n // - 2/n
6/15-(2/n) = 0
6/15-2*n^-1 = 0
-2*n^-1 = -2/5 // : -2
n^-1 = 1/5
-1 < 0
1/(n^1) = 1/5 // * n^1
1 = 1/5*n^1 // : 1/5
5 = n^1
n = 5
n = 5
| 11x-8x+2=-25 | | 60=4x-8 | | 6=6-3(2x-6) | | 95-x=184 | | 6-6x=8x | | 38-x=214 | | x^2-2x+15=30 | | 6a+3=3a+21 | | -5.2x=-18.2 | | x+23=92 | | 5cosx-12sinx=0 | | -x+20=-2x+28 | | 44=3v-10 | | 6(2x-6)=-7(2x+4) | | 84=-2s | | 9+3(5+d)=2(2d-5)-1 | | 6/7*1/2*4/3 | | 8x+5=5x+-3 | | 4y-4=5x | | 4x+3=3(x+1) | | 0=20log(x/6) | | 0=20logx/6 | | XY-XZ=0 | | 6c+9=13-4c | | 75x^2-192=0 | | 2(x+4)-4(x-1)=0 | | 2x+0.01=x | | A=1/2b12 | | 4x+20+3x+15=180 | | 4x+19=35 | | 3x+17+5x+21=90 | | 4+b=b+18 |