Final answer:
Amy has $21, Tony has $26, and Brian has $63.
Step-by-step explanation:
Let's assign variables to each person's wallet: Amy = x, Tony = x + $5, and Brian = 3x. We know that the total amount in their wallets is $110, so we can write the equation x + (x + $5) + 3x = $110. Simplifying this equation, we get 5x + $5 = $110. Subtracting $5 from both sides, we have 5x = $105. Dividing both sides by 5, we find that x = $21. Therefore, Amy has $21, Tony has $26, and Brian has $63.