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)
(-1/3)*m+1/3 = 8/3 // - 8/3
(-1/3)*m+1/3-(8/3) = 0
(-1/3)*m+1/3-8/3 = 0
-1/3*m-7/3 = 0 // + 7/3
-1/3*m = 7/3 // : -1/3
m = 7/3/(-1/3)
m = -7
m = -7
| 2/3-4m=-130/3 | | 5/7a-8=-219/28 | | -6m+9=41/3 | | -1/5m+1=49/60 | | ba-cd=3a | | 1/2a+7=71/10 | | n+7=3n | | -5t+1/2=71/2 | | 2/3-2a=-64/3 | | 4k-10=22 | | 5k+7/10=257/10 | | 1/7x+7=193/28 | | 2t-3/8=93/8 | | 3/2+1/4-x/3=5/12 | | -1/3b+3/5=56/135 | | d-8=-65/8 | | 1-7a=3 | | 3b+4/5=49/5 | | -9-1/3w=-35/3 | | 4w-1=11 | | 4/5a+7=67/5 | | d-4=-13/4 | | 7m+7=63 | | 6/7a-9=-93/7 | | 3t+1/4=85/4 | | 3/5b+1/6=-211/30 | | X^4-26X^2-28=0 | | 1/3+6x=-215/3 | | 3b+3/10=153/10 | | 10+3d=7 | | 3d+6=13/3 | | -7b-1/2=167/2 |