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)
4.75/14.25 = 0.3/n // - 0.3/n
4.75/14.25-(0.3/n) = 0
4.75/14.25-0.3*n^-1 = 0
-0.3*n^-1 = -0.33333333 // : -0.3
n^-1 = 1.1111111
-1 < 0
1/(n^1) = 1.1111111 // * n^1
1 = 1.1111111*n^1 // : 1.1111111
0.90000001 = n^1
n = 0.90000001
n = 0.90000001
| 4.5/11.7=1/c | | 48n^2-147=0 | | =(4-x)(4+x) | | X+2=2x+4-12 | | 1.5/3.5=d/21 | | 2=5+7p | | 3x^2+31x-420=0 | | 5/20=r/9 | | 121/16.5=22/z | | 57/63=f/21 | | 2/30=24/g | | 0.3+0.7y=0.85 | | Tangent64=X/14 | | a^6+4a^4-5a^2= | | 2x^3-5x^2-x+4=0 | | 24x^2+2x=1 | | -2x=1x | | 56/8=42/w | | 225/480=a/64 | | 2/9=3/2(4/9X-1) | | 15x^2-37x+18=0 | | 15x^2-82x+99=0 | | 60/132=5/u | | (9z^5u^7-20z^5u)/(-4z^3u^5) | | 3y/2z,4xz^2 | | 4x*4x+2x-7=0 | | 3(1-6x)=6x-21 | | -a+4(2+7a)=36-a | | 8x+12y=2000 | | 15X^2-62x-3=0 | | 2x+2-10x-14=0 | | -0.62x+0.15x^2=0.03 |