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.
12 + x = 23
So, what do you think?
23-12 = cost of t-shirt.
x+12 = 23.
The unknown information in this problem is the cost of the T-shirt.
To set up an equation, we can let x represent the cost of the T-shirt. Since Leona bought a T-shirt and a book for a total of $23, we can write the equation:
x + $12 = $23
To solve the equation, we need to isolate the variable x. We can do this by subtracting $12 from both sides of the equation:
x + $12 - $12 = $23 - $12
x = $11
Therefore, the T-shirt cost $11.
Answer: The T-shirt cost $11.