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)
7/3 = 28/n // - 28/n
7/3-(28/n) = 0
7/3-28*n^-1 = 0
-28*n^-1 = -7/3 // : -28
n^-1 = 1/12
-1 < 0
1/(n^1) = 1/12 // * n^1
1 = 1/12*n^1 // : 1/12
12 = n^1
n = 12
n = 12
| 4(x+3)/6=3x-1 | | 3x/14-6=x/7+1 | | -5y+7=-6y+5 | | 5/8y-8=12 | | 8x-4=-14 | | 9x^2=3x+6 | | (7x-3)(x^2+12x+36)=0 | | 36-2n=60 | | -5y=8-3x | | 50(b-3)=5/2 | | mn-m= | | 25t-2=-35 | | 11+x=1 | | -8d-3=12 | | 6x-4=3x-4 | | 3x+17+5x+15=180 | | x+11+5x-4=5x+17 | | 8x-2y=26 | | (90-a)+(180-a)=180 | | 3x-7+4x+1=10x-30 | | 1.9f=11.78 | | 1/4(t+9)=18 | | 11+6n-5-5=-12 | | 5(x+3)-y=3(y+2)-x | | y=3.7x+0.6 | | 8/24=5/12 | | ((2x-3)/(2))+((5x)/(x+1))=x | | 4(x+2)+3y=3(y-2)+2 | | 3+2x/7+5-x/5=26/35 | | 6ln(3x+4)=18 | | 2.22x+6.66=13.32 | | x/4-4=10 |