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)
30/k = 10 // - 10
30/k-10 = 0
30*k^-1 = 10 // : 30
k^-1 = 1/3
-1 < 0
1/(k^1) = 1/3 // * k^1
1 = 1/3*k^1 // : 1/3
3 = k^1
k = 3
k = 3
| N(-8)=104 | | (4x-25)=(2x+30) | | 5y+5(2)=10 | | 15=55w | | 5v-2=27 | | X+3=98 | | r+10r= | | 400+50x=1200 | | x/6x-7 | | 3(x+2)=5(x-5) | | f+2.22=20 | | -x+1=28 | | 3x/11-8x | | (4x-25)=(2x+75) | | 6a^2-6b^2= | | 12r-12-8= | | m^(1/3)*2m | | 6a+-5+8a=-19 | | 3c+8=3c+4 | | 4t-12=2t | | sin(9x)/x | | 9/12=x/4 | | 7x-5(x+17)=-63 | | 81=r*27 | | 5x^2-34=34 | | N-10=9 | | 9a+2a+7=0 | | 270.04=2r^2 | | 3/8=x/3 | | 8x-(4x+6)=2x-22 | | 7(h+2)+3=87 | | 4.1x=2(2.05x) |