A family of 6 eats at an Italian restaurant. Some order a meatball sub for $9. Some order chicken parmesan for $11. The total bill was $58. How many ordered the meatball sub?

Answer 1

Say all six had chicken, then the bill would be $66, or $8 too high. Since the $66 total will decrease $2 for each meatball sub, you need 4 subs to decrease the bill $8. ans 4 subs 2 chickens.

You can double check by saying all eat subs. 9x6 = 54. Since each chicken raises the cost $2, you need 2 chickens, 4 subs.