[Please help] At the mall, Leona bought a T-shirt and a book for a total of $28. The book cost $12. How much did the T-shirt cost?

2A) What is the unknown information?


2B) Let x represent the unknown information.Write an addition equation that models the problem.


2C) Solve the equation by writing a related equation and showing the answer.



2D) Answer the question in complete sentence.