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)
50/k-10 = 0
50*k^-1 = 10 // : 50
k^-1 = 1/5
-1 < 0
1/(k^1) = 1/5 // * k^1
1 = 1/5*k^1 // : 1/5
5 = k^1
k = 5
k = 5
| 2y^2+(-y+8)=(2y+3)(y-4) | | -10=1-6n-5n | | X+6=x+1 | | -2x/3-6=-10 | | 2/3-i | | 4+6w+10=100 | | 2v-6=0 | | -10(x+2)=-210 | | 80+X=60 | | 3+6*3-1= | | 60+x=80 | | (4x+9)(2x-3)=0 | | x-8y=-9 | | 5x+282=1972 | | -4x+5x=-6 | | 6x+4x=x+3 | | -9(-8+r)=171 | | 3X-10+7X-32=180 | | 25-P=Q | | (6x+42)=(18x-12) | | x+4/5-x-5/4=3 | | 6(2x-3y)-(x+7y)= | | 80y+7=20 | | 6x-3=3+5x | | 80y+8=20 | | 5t+10=0 | | (64a^9b^12)^2/3 | | X(x+3)(x-3)=440 | | (x+4)/5-(x-5)/4=3 | | h=76.8t^2-16t^2 | | 4x+1-x=6x-2 | | 3x^2+10=15+8x |