Step-by-step explanation:
step 1. 15n + 75v = 330, n - v = 2.
step 2. This is a system. solve the system.
step 3. multiply the 2nd equation by 15 and subtract from the 1st equation.
step 4. 90v = 300. v = 10/3
step 5. n - 10/3 = 2. n = 16/3.
step 6. new = 10/3, vintage = 16/3.
step 7. either they sell games in thirds or the question has a mistake.
