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)
-5*k-10 = 30 // - 30
-5*k-30-10 = 0
-5*k-40 = 0 // + 40
-5*k = 40 // : -5
k = 40/(-5)
k = -8
k = -8
| -3+2w=-25 | | -3-2a=-17 | | 5m+3=-52 | | -5b-10=25 | | 3d-2=4 | | -7b+3=-46 | | 2+6k=50 | | 6+4n=-14 | | 6+5m=41 | | -7a+3=80 | | 10+3k=4 | | -2d+2=18 | | 10m-1/4m-3-8-2m/4m-3 | | 54=4h+8 | | 4+6b=-14 | | 6a-4=38 | | -6t+6=-54 | | -9-4k=-41 | | -5+5t=15 | | -2-5t=-42 | | 2x^2+18x-1448=0 | | -3a+6=-21 | | -3t-5=-2 | | -2b-1=-19 | | 1-5d=-39 | | -1+6w=41 | | 3m+4=31 | | -4+3x=8 | | x-11y=1 | | -7+6m=35 | | -5a-6=-21 | | -3b-9=-45 |