A fruit vendor had a certain number of apples for sale at the beginning of the day. The first customer that day purchased 3 apples plus
\boxed{\text{Final Answer: The fruit vendor had 28 apples for sale at the beginning of the day.}}
Step 1 :Let x be the number of apples at the beginning. After the first customer's purchase, the vendor had
Step 2 :Solve the equation for x:
Step 3 :\boxed{\text{Final Answer: The fruit vendor had 28 apples for sale at the beginning of the day.}}