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)
8/5 = 4/k // - 4/k
8/5-(4/k) = 0
8/5-4*k^-1 = 0
-4*k^-1 = -8/5 // : -4
k^-1 = 2/5
-1 < 0
1/(k^1) = 2/5 // * k^1
1 = 2/5*k^1 // : 2/5
5/2 = k^1
k = 5/2
k = 5/2
| 1.8/6 | | -3x+8y=12 | | -15x-9=-30x+6 | | c=5(p-30)+370 | | 4/9=8/k | | (2-3y)3=24 | | -42/x-3=-7 | | 4c(-7c-3j)= | | 8x+18-7x=-5+(-10) | | 4x+x=1 | | H/9-19=-3 | | 15*b=23 | | 25+3*x=54 | | t+10-4t=-6 | | -5(2t+6)=0 | | 2.2/4=n/44 | | 7/x=11/6 | | 4/5=-1/2v-1/3 | | 8(2+3)=69(9-69) | | x^3+2x^2-5x+1=0 | | 2(3y+5)=3(5y+.33333333) | | -4.9x^2+20t-3x=0 | | 8x+18-7x=-5+(10) | | 5/3=2/r | | 4c(-7c-3)= | | 8(4-3f)=80 | | 3w-42=-9(w-2) | | -4.9x^2+20t-3x=2 | | 2(3y+5)=3(5y+.333) | | 8x+18-7x= | | 12=5(x+6)-8x | | x+6=10x-39 |