12 + x = 23
So, what do you think?
At the mall, Leona bought a T-shirt and a book for a total of $23. The book cost $12. How much did the T-shirt cost?
What is the unknown information?
Let x represent the unknown information. Write an addition equation that models the problem
Solve the equation.
Answer the question.
2 answers
23-12 = cost of t-shirt.
x+12 = 23.
x+12 = 23.