I think it is factored out like this:
1/3(b-1)
2>8-4h/3 subtract 8 from both sides
-6>-4h/3 multiply both sides by 3
-18>-4h divide both sides by -4 (and reverse sign because of division by a negative value)
4.5<h or by convention...
h>4.5
Answer:
50% chance because there is 2 sides heads and Tails so u have a 50% chance of heads and 50% chance of Tails