Write a math word problem about burgers using this expression 1/2x + 0.5 - 4 + 3 = 12 and getting the exact answer 25.
A fast food restaurant sells burgers for $2 each. If a customer buys 1/2x + 0.5 burgers, the total cost is $12. How many burgers did the customer buy?
Answer: The customer bought 25 burgers.