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)
6/18 = 3/n // - 3/n
6/18-(3/n) = 0
6/18-3*n^-1 = 0
-3*n^-1 = -1/3 // : -3
n^-1 = 1/9
-1 < 0
1/(n^1) = 1/9 // * n^1
1 = 1/9*n^1 // : 1/9
9 = n^1
n = 9
n = 9
| 73=3x^2 | | 28+19w=-8+15 | | 4.08(x+10)=9.2(x-2) | | 5/3p=-10 | | 3x-6y+7x+21y-3y= | | 6x^2y^2-2xy^2-6x^3y= | | 2x+6=31 | | 5x+6+2x=6+7x | | 6x^2y^2-2xy^2-6xy^2= | | 18x^3y/2y | | 2-x/=30 | | 2x+10+2x=10+4x | | 4(-1+5)+256= | | 2.5x+3=7x | | 3.1-1.8/4 | | -x-7=2x-5 | | x+.631x=.1 | | 18x-72=20x+100 | | 14t-1=(1-2t)(-3)+12 | | 7=4r+3r | | 3+log^2(2x)=4 | | -2(4t-4)+3t=4t-8 | | x/-61/3 | | 2xb= | | 9x/21x^2 | | 18x-12=20x+100 | | 12x+11=4x-2+8x | | x^2=125-20x | | 0.00027=0.18 | | 5v-7=-27 | | (7-4x)/3=(1-3x)/2 | | 4+6x+2x=28 |