If it's not what You are looking for type in the equation solver your own equation and let us solve it.
m in (-oo:+oo)
6*m+2*m+3 = -85 // + 85
6*m+2*m+3+85 = 0
8*m+88 = 0 // - 88
8*m = -88 // : 8
m = -88/8
m = -11
m = -11
| 7n-3-n=-3 | | 7k+7+5k=-65 | | -21=7t+3t+9 | | 35=6m+2m+3 | | 64=b+4b+9 | | 5k+5+2k=26 | | 71=-4a-5a+8 | | 2+7n-6n=6 | | -2+6m+5m=-35 | | 6=-5b-7b+6 | | 1+n+n=-3 | | 1-4a+2a=-7 | | -4x+4+5x=5 | | -5n+1-3n=25 | | 4x-8-5x=-8 | | 28=b+b+8 | | -6=-k+3k-10 | | 2k+6-k=6 | | 47=2b+5b+5 | | 7b+7+b=-49 | | -4-6d-7d=-134 | | 5n+1-2n=10 | | 6d+9-5d=18 | | -3+3b+5b=69 | | 4b+9-2b=23 | | 4+t-4t=4 | | -3t+6+6t=21 | | 4d+9-6d=7 | | b-9+7b=79 | | 2b+1+4b=43 | | -63=-7n+n+3 | | 6m-3+3m=-66 |