If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
3*t+2*t+6 = -9 // + 9
3*t+2*t+6+9 = 0
5*t+15 = 0 // - 15
5*t = -15 // : 5
t = -15/5
t = -3
t = -3
| -4a-9+2a=9 | | 39=7k+3k+9 | | -8+2b-5b=-26 | | -10+2b+7b=-91 | | w-10-4w=-7 | | -6x+7+x=-43 | | -6m-6+5m=-7 | | -7d+1+3d=37 | | x+10+x=-10 | | -8=-4w+2w+8 | | -8+3m-m=-8 | | 10-2d+d=17 | | k+10+k=18 | | 4+4x+4x=60 | | 3+n-2n=15 | | 6d-3-2d=25 | | 17=2d+2d+5 | | n-9+4n=51 | | 40=2k+5k-9 | | -1+n-4n=-31 | | 4+4b-7b=-23 | | 13=2a-a+10 | | 3m+1+6m=-89 | | 4w-6-5w=-7 | | 3m+3-m=7 | | 4a-1-2a=7 | | -10=-7n+n-10 | | 4/7(7x-28) | | 0.6+0.7+0.8= | | 14=-3k-k+6 | | -7a-10+2a=-40 | | 97=5d+3d+1 |