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)
-1 = m-(2*m)+1 // - m-(2*m)+1
2*m-m-1-1 = 0
m-2 = 0 // + 2
m = 2
m = 2
| 10-5x-x=40 | | 15=-3a+5a+9 | | 10-6w+5w=2 | | -6-n+2n=-14 | | 6=5t-2t-9 | | z=a+blnx | | -3=-4w+2w+9 | | 9-7k+k=-33 | | -22=2n+4n+2 | | -7b-7+3b=1 | | 6n-8-n=47 | | -9+2t+6t=71 | | 7n+8+3n=-2 | | 3w+5+5w=93 | | -10+7b+7b=32 | | -7-7t-4t=-29 | | x+3+x=5 | | 58=6x+2x-6 | | n+2+4n=32 | | -53=2k+5k+10 | | -6-5n-n=-42 | | -7=d+d+3 | | 6+3w+5w=78 | | 9-7n+2n=4 | | 95=6a+3a-4 | | -2+3d-d=14 | | -7n+9+n=-3 | | -3-19x=25+4x | | 64=3x+.5y | | 13=6b+2b-3 | | 2+7k+4k=57 | | -71=-7w-w+9 |