Let the cost of each of the first three tires be \( x \). According to the holiday deal, the cost of the fourth tire is $5.
Therefore, the total cost for the four tires can be expressed as:
\[ 3x + 5 = 237.50 \]
Now, we will solve for \( x \):
- Subtract 5 from both sides:
\[ 3x = 237.50 - 5 \]
\[ 3x = 232.50 \]
- Now, divide both sides by 3:
\[ x = \frac{232.50}{3} \]
Calculating that gives:
\[ x = 77.50 \]
Thus, the cost of each of the first three tires is $77.50. Therefore, the correct response is:
$77.50