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)
5 = 30/k // - 30/k
5-(30/k) = 0
5-30*k^-1 = 0
-30*k^-1 = -5 // : -30
k^-1 = 1/6
-1 < 0
1/(k^1) = 1/6 // * k^1
1 = 1/6*k^1 // : 1/6
6 = k^1
k = 6
k = 6
| 7(2n+2)=6(4n+7)+9 | | -9x+5=9-9x-5(18/6(-6)+23) | | x/4+(x-5)/3=10 | | x/4+x-5/3=10 | | (x/4)+(x-5/3)=10 | | 2x+1=-19+7x | | 25+20d=165 | | N+21=29 | | -4(x+7)-44=1-53 | | -9x-(10-1x)=-34 | | 7x+17-6x=-8-11 | | 2n-6=3n-11 | | x+5=-2x+5 | | 11548+9382780= | | 1(2-x)+1(-3+1)=12 | | 16-4c= | | 3x+3=7x+3 | | -5x+7+x=-17 | | m+mnp=q | | 2x-7/12-4-x/6=11/20 | | 4x-11=61 | | 13.95x+1.95=85.65 | | 1.33w+-12=0.66w | | 5(x+2)-(6n+4)= | | 19x=18-(-1) | | -3x-1/3+4x=20/3 | | 4h+2=18 | | 2x-19=9x+2 | | A=18-2(0) | | 8x+12=4x+116 | | x+150000+x=625000000 | | 3-4x-6-8=5x |