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)
7*k+7 = -3*k-23 // + -3*k-23
7*k-(-3*k)+7+23 = 0
7*k+3*k+7+23 = 0
10*k+30 = 0 // - 30
10*k = -30 // : 10
k = -30/10
k = -3
k = -3
| 10+2t=5t-5 | | 3x+9=20+2x | | 3b+6=18+5b | | 7x-2=61-2x | | 1+6a=-3a+1 | | 9+2d=3d+3 | | 6b-1=b+49 | | 4m-7=-2m-73 | | 2t+3=5t+0 | | -n+10=-3n+34 | | 10+7b=2b+35 | | k+10=-6k-39 | | -7a+6=-6-5a | | 4b+2=0+6b | | -7+5d=-d+41 | | 5-t=6t-16 | | 5d-2=7d-8 | | -4m-4=-4+4m | | 8+4w=3w+20 | | n-2=6n-47 | | 3-7w=-2w+13 | | 2t+8=t+8 | | 2b+10=42-6b | | 7+5x=-4x-83 | | 6w-6=-16+7w | | 7t+5=4t+8 | | -7w+5=2w+86 | | 4a-5=13+6a | | 2+2m=7m-3 | | 9-7b=-2b-21 | | 2t+3=-69-6t | | 7b+6=-7b+20 |