If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( k )
k = 0
k = 0
k = 0
k in (-oo:0) U (0:+oo)
39/k = 9/4 // - 9/4
39/k-(9/4) = 0
39/k-9/4 = 0
39*k^-1 = 9/4 // : 39
k^-1 = 3/52
-1 < 0
1/(k^1) = 3/52 // * k^1
1 = 3/52*k^1 // : 3/52
52/3 = k^1
k = 52/3
k = 52/3
| -9+r+3-2r=3r-5r | | 27+.25p=67 | | 5.5m+15=70 | | 5z-20=-55 | | -6(3a+2)-1= | | 15x-4=25x+4 | | 1/2w-3/4=2/3w+2 | | 5=7w-8w+2 | | 8.7+x=0.8 | | 6+-11=10x-51 | | 14.7-40*0.13= | | 9x+14=13x-10 | | 2(6k+8)=5(k-8) | | -m+10=3m-10 | | 4x+12=132 | | (2x+13)(3x-7)=0 | | 1/2(8x-4)=3(8-3x) | | (-56x-49)=7x^2 | | 3b+15=3(b+15) | | 3x-1=149 | | -3x+5x-1=0 | | 12=24x-3 | | -6x+133=-62+9x | | 0.83=0.33+d | | -2[x]=8 | | 9(w-8)=8w-2 | | 3x(x+4)=7x+4 | | (-8-4i)(5-6i)= | | -4x+7=-9x+24 | | 20-3x=-13 | | 5=7w-8+2 | | 5(r-5)-4(r-1)=2(r+6) |