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)
81 = 4-6*m-(5*m) // - 4-6*m-(5*m)
5*m-(-6*m)-4+81 = 0
6*m+5*m-4+81 = 0
11*m+77 = 0 // - 77
11*m = -77 // : 11
m = -77/11
m = -7
m = -7
| 66=-x+7x+6 | | -86=4b+3b-2 | | 96=2k+7k+6 | | -18-8w=-66 | | 4+7d+4d=136 | | -23=3t+6t+4 | | -6t+3-3t=-105 | | 16=w+4w-9 | | 9+7a+2a=0 | | 1-a+2a=3 | | 17=a-5a+9 | | x+(1-x)=1 | | -2m+10-7m=91 | | -36=2a-5a-9 | | 11=-a+4a+5 | | 2=-5b+6b-6 | | -4m+6-6m=-104 | | 8-2b+5b=29 | | -77=5d+5d+3 | | ln(x-4)=ln(2x-3) | | -3+3x+3x=-27 | | w+5-5w=5 | | -135=5w+7w-3 | | -9+7n+7n=-93 | | 96=5n+6n-3 | | 5b+5+2b=12 | | 1=5m+2m+1 | | -2w+6+4w=-8 | | -3k+8+6k=44 | | -4-d+3d=-18 | | -14=-2x+4x+10 | | 4+5m+6m=125 |