Answer:
Each shirt costs $11 and each pair of pants costs $11.
Explanation:
If 1 shirt costs $11, & a pair of pants also costs $11, I buy 1 shirt, my total is $11. Now, I buy 3 pairs of pants, 11x3 is $33, so 33+11 is $44. My total is $44.
My friend buys the 3 shirts, $33 is my friend's total. He now buys 1 shirt, which is also $11. Again, 33+11=$44