Bailey buys two shirts. The blue shirt costs $13, which is $2.50 more than the price of the red shirt. What is the cost of the red shirt? Write and solve an equation to find the answer, using r to represent the cost of the red shirt.

Question

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Answer 1

Let's define the cost of the red shirt as \( r \).

According to the problem, the blue shirt costs $13, and it is $2.50 more than the price of the red shirt. Therefore, we can write the equation as:

\[ 13 = r + 2.50 \]

To find \( r \), we can solve the equation by subtracting \( 2.50 \) from both sides:

\[ r = 13 - 2.50 \]

Calculating the right side gives:

\[ r = 10.50 \]

Thus, the cost of the red shirt is \( \boxed{10.50} \).