If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
3*k-6 = -42 // + 42
3*k-6+42 = 0
3*k+36 = 0 // - 36
3*k = -36 // : 3
k = -36/3
k = -12
k = -12
| 8-3k=-16 | | 89x=9 | | 3k-1=-10 | | 6t-1=41 | | 5k+2=-38 | | 8+4b=52 | | 6a-3=15 | | -(y/3)=18 | | 5+6k=41 | | -6m+6=42 | | 3-7n=-32 | | 7n+2=30 | | -3+6n=57 | | 5+4n=1 | | 5b-8=-58 | | 3t+8=-25 | | -4t+7=-41 | | 5k+5=35 | | 3n-10=-10 | | 2m=(9t)/(5k-7) | | -6n+2=44 | | 9-6k=39 | | 2a+10=16 | | -4b-9=-17 | | -7w+7=91 | | 2+7d=23 | | -1+5x=-31 | | 2/3x+6=10 | | -8+4b=-28 | | 2+3d=29 | | 10-6t=-44 | | -2n-10=0 |