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)
20/n = 4/4 // - 4/4
20/n-(4/4) = 0
20/n-1 = 0
20*n^-1 = 1 // : 20
n^-1 = 1/20
-1 < 0
1/(n^1) = 1/20 // * n^1
1 = 1/20*n^1 // : 1/20
20 = n^1
n = 20
n = 20
| 3.9x=27.3 | | 7+5u=-3 | | 2x-1=-x-7 | | -7=3w+5 | | 7x-4-3x=19+1 | | 6/15=2/n | | 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 |