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)
9-6*m-(7*m) = -30 // + 30
9-6*m-(7*m)+30 = 0
9-6*m-7*m+30 = 0
39-13*m = 0 // - 39
-13*m = -39 // : -13
m = -39/(-13)
m = 3
m = 3
| 2b+6-3b=5 | | 6t-10+4t=110 | | 4m+7+6m=-53 | | -8+3t+5t=0 | | 7=7m+7m-7 | | -3n+10+2n=20 | | 17=-3b+5b-5 | | 3a+4+7a=124 | | -7a-3+3a=29 | | -1-6w+2w=-25 | | 4=-5k+4k+1 | | 6=-2t+3t+3 | | 33=k+4k+8 | | 6m-9+m=40 | | 37=5w+2w+2 | | 2b+4+5b=11 | | -7d+7+4d=-20 | | -16=-3a+5a+2 | | 11=6n+2n-5 | | -d+1+5d=-23 | | -5n+8+4n=5 | | -5n+8+n=0 | | 11=2d+4d+5 | | -9+5k+6k=-31 | | 2t+8+5t=-41 | | 3b-6-5b=-26 | | 7n+8-6n=20 | | -1+5a-4a=6 | | 7b+5-4b=14 | | 4+5m-3m=4 | | -7d+7+d=1 | | -4-4w-6w=16 |