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)
5*a+9 = 108-(4*a) // - 108-(4*a)
5*a+4*a-108+9 = 0
9*a-99 = 0 // + 99
9*a = 99 // : 9
a = 99/9
a = 11
a = 11
| 5x-9=4x-15 | | 6-2t=4t+0 | | 4b+6=b+33 | | -2d+9=-4d+23 | | -4x+10=-110+6x | | 2b-10=62-7b | | 4a+5=5a+17 | | -9+3k=-k-21 | | -4w+10=-3w-2 | | -7d+7=2d+79 | | -4k-2=-56+5k | | -2b-3=b+30 | | 10+7k=-k-54 | | 1-7b=7b-83 | | 4n+10=3n+4 | | 1+5m=4m+6 | | -4a+9=7a-90 | | 9+3k=-3k+9 | | -2w-2=-38+7w | | -7x+42+6x-1=36 | | -10+2x=7x-60 | | 985-69x=8 | | -5b-4=4b-13 | | 2+3d=6d-13 | | 4x+5=104-7x | | 5+a=4a+11 | | -9-5a=-2a-9 | | -9+4a=2a+7 | | 2m+8=68-4m | | 7x+10=6x+1 | | n+6=30+3n | | 4a+5=3a+9 |