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)
40/n = 15/8 // - 15/8
40/n-(15/8) = 0
40/n-15/8 = 0
40*n^-1 = 15/8 // : 40
n^-1 = 3/64
-1 < 0
1/(n^1) = 3/64 // * n^1
1 = 3/64*n^1 // : 3/64
64/3 = n^1
n = 64/3
n = 64/3
| -4(5t-2)+7t=2t-9 | | -6-(8)+(-11)= | | Q=4186*3.21*100 | | -24+2n=-5(-3n-3) | | 15x^2-14x-13=0 | | 21=37-4e | | 9-(-z)=34 | | 9/10=4/n | | 4m-7=2m-8 | | 2=4(3k-8) | | 6c+8-3c+4= | | 6x-9=6(x-1) | | 39/19=12/n | | -6w+1=7w+1 | | 2(2d+1)-3d=5(3d-3)+4d | | 2(t+9)/3=t-8 | | 5x+15-3x=9+4x-6 | | -6+(8)-(-11)= | | 2n+12=-3-n | | 8(x-3)-9=25 | | 6(2x-5)=-(x+40) | | -8z-6.5-9=-22.5 | | -6+8-(11)= | | -24y+30=18 | | -6(7x-9)+1=-42x+55 | | -18.5=5+6.5(r+2) | | 2/5r-9=-19 | | -5y-12=3y+20 | | (2x+7)=63 | | .40=280 | | x+4x+-14=90 | | x/2+x/4+3x/4=0 |