Answer:the cost of each shirt was less than $43.75
Explanation:
Let x represent the cost of a shirt. Since the 2 shirts that iron man bought were of the same amount, then, the total cost of the 2 shirts will be $2x
He also bought a pair of shoes. The shoes cost 12.50. If his total bill was less than 100, it means that
2x + 12.5 < 100
2x < 100 - 12.5
2x < 87.5
x < 87.5/2
x < $43.75