Barry's mountain bike weighs 6 more pounds than Andy's. If their bikes weigh 42 pounds altogether, how much does Barry's Bike weigh?

24 pounds

Step-by-step explanation:

let Andy's bike be x pounds then Barry's bike is x + 6 (6 pounds more)

The total weight of their bikes is 42, hence

x + x + 6 = 42

2x + 6 = 42 (subtract 6 from both sides of the equation)

2x = 36 (divide both sides by 2)

x = 18

Hence Barry's bike weighs x + 6 = 18 + 6 = 24