Solve for h. What is h?
Problem 20h=2

Really need on these. i have no idea what to do

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?