SOLUTION: Your family of 6 went to a Italian restaurant for dinner. Everyone had a sub, either meatball for $9 or chicken parmesan for $11. If the total bill was $58, how many people order
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Question 677622: Your family of 6 went to a Italian restaurant for dinner. Everyone had a sub, either meatball for $9 or chicken parmesan for $11. If the total bill was $58, how many people ordered each type of sub?
Answer by ReadingBoosters(3246) (Show Source): You can put this solution on YOUR website!
9x+11y = 58
x+y=6
...
9(6-y) + 11y = 58
54 - 9y + 11y = 58
2y = 58 - 54
2y = 4
y = 2 people who ordered chicken parmesan
...
9x+11(6-x) = 58
9x + 66 - 11x = 58
-2x = 58 - 66
-2x = -8
x = 4 poeple whow ordered meatball
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