If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
2*a+4 = -2*a-24 // + -2*a-24
2*a-(-2*a)+4+24 = 0
2*a+2*a+4+24 = 0
4*a+28 = 0 // - 28
4*a = -28 // : 4
a = -28/4
a = -7
a = -7
| -2d-6=6d+66 | | 6d-5=d-50 | | -9-3k=6k-54 | | 4w+9=-18+7w | | 1-5n=6n+12 | | -d+7=28+6d | | 7d+5=d+41 | | -3x+8=-5x+24 | | 7+6k=5k+5 | | -7b+3=135+5b | | -3w-7=-88+6w | | 3w+8=-40+7w | | 6m+8=-5m+41 | | -2d-7=-79+7d | | 7-5n=3n+55 | | 7d+10=2d+70 | | -2k+9=-51-7k | | 6w-6=10+2w | | 5+4d=7d-7 | | 4-6b=7b-113 | | 5w+4=2w+16 | | -5a-7=3a-15 | | 5k+9=-1+6k | | 7t+5=6t+16 | | x+2=-3x+50 | | n+4=64+6n | | 7m+5=m+77 | | -2t+9=-27+4t | | 5-2d=7d+23 | | n+3=3n+13 | | -7t+7=-11-t | | 4a+3=6a+23 |