SOLUTION: a pizza shop delivered 16 pepperoni pizzas to a college on the first night of final exams. the total cost of the pizzas was $128. a small pizza costs $4 and contains 3 ounces of pe

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Question 903962: a pizza shop delivered 16 pepperoni pizzas to a college on the first night of final exams. the total cost of the pizzas was $128. a small pizza costs $4 and contains 3 ounces of pepperoni. a medium pizza costs $9 and contains 5 ounces of pepperoni. a large pizza cost $11 and contains 10 ounces of pepperoni. the owner of the pizza shop used 6 pounds 7 ounces of pepperoni in making the pizzas. how many pizzas of each size were delivered to the college?
Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website!
Let = number of small pizzas delivered
Let = number of medium pizzas delivered
Let = number of large pizzas delivered
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(1)
(2)
(3)
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(3)
Multiply both sides of (1) by
and subtract (1) from (3)
(3)
(1)
---------------------------

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Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
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Subtract:

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and,

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(1)
(1)
(1)
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6 small
3 medium
7 large
were delivered