If it's not what You are looking for type in the equation solver your own equation and let us solve it.
w in (-oo:+oo)
6*w+9 = 15 // - 15
6*w-15+9 = 0
6*w-6 = 0 // + 6
6*w = 6 // : 6
w = 6/6
w = 1
w = 1
| 7m+2=72 | | 1-7m=-6 | | 7-7b=-14 | | 2-2w=-6 | | 7-7n=14 | | -4k+10=22 | | -6b+8=26 | | 6+5m=21 | | 6k+7=-59 | | 7x-10=-31 | | -7t+4=-24 | | 7+5w=22 | | -5+5n=0 | | -7d+8=-34 | | 5k+4=44 | | -6b+3=-39 | | 6w+5=71 | | 7d-4=45 | | 3m-8=-44 | | -5w+6=61 | | -3t-9=-9 | | -5+2d=1 | | 2+4t=-2 | | 6x+4=-62 | | 6b+8=26 | | -2+4n=-30 | | 6w-4=-58 | | 4a-4=-12 | | 10+5a=-30 | | 4n+8=40 | | 8+4a=48 | | 8-3d=-10 |