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)
m+1 = -8 // + 8
m+1+8 = 0
m+9 = 0 // - 9
m = -9
m = -9
| -3=a-5 | | -2t=4 | | b+10=12 | | n/3=-2 | | 42-6x=3x+16 | | 5=t+4 | | 1=w+5 | | t-9=-7 | | -15=k-7 | | d+3=-3 | | -7n=-7 | | 2+6n=-8 | | w+3=13 | | -1=t+2 | | 5+b=12 | | 2+n/6=-8 | | 5m=-60 | | 12=b+8 | | -6=k+2 | | -7=w-8 | | 12=n+10 | | 7=d+3 | | k/6=5 | | t+5=7 | | w+6=-2 | | 10+k=-2 | | -10+b=-8 | | 4+k=7 | | -7m=-21 | | -13=n-1 | | -15=n-5 | | d/-3=-2 |