If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
6*n+6*n-3 = 9 // - 9
6*n+6*n-9-3 = 0
12*n-12 = 0 // + 12
12*n = 12 // : 12
n = 12/12
n = 1
n = 1
| 19=-3d+6d+1 | | 5+2x-3x=5 | | 4m+10-m=31 | | 2+2d+3d=52 | | -7m-9+5m=-9 | | 47=7t+7t-9 | | 8=b+4b+8 | | 20=3d+6d-7 | | 10+5x+4x=-8 | | 3m-2+4m=26 | | 3n-3+n=-3 | | 4a-2-7a=-11 | | 10+3m-7m=-14 | | 7k+8-2k=-32 | | -9+4n+7n=123 | | 102=6k+4k-8 | | 7x+9+x=73 | | -3n+9+2n=1 | | 24=-b-2b+3 | | k+6-6k=-14 | | -21=2d-5d+6 | | 3x+14=106-9x | | 4x+2-x=35 | | m+7+2m=16 | | -2n+10+7n=0 | | 1-7t+3t=33 | | 3w+3-4w=-4 | | 6+6m+m=-36 | | 2t+10+3t=-35 | | 135-6x=21x+18 | | 10=-3a-6a+1 | | 9+3b+7b=49 |