Question 1063210: A dozen cookies and a loaf of bread cost $6.70. Half a dozen cookies and 2 loaves of bread cost $6.20. A loaf of bread costs? Found 3 solutions by stanbon, josmiceli, Edwin McCravy:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A dozen cookies and a loaf of bread cost $6.70. Half a dozen cookies and 2loaves of bread cost $6.05. A loaf of bread costs?
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12c + b = 670 cents
6c + 2b = 605 cents
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Modify for elimination:
12c + b = 670
12c + 4b = 1210
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3b = 540
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b = $1.80
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Loaf of bread cost:: $1.80
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Cheers,
Stan H.
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You can put this solution on YOUR website! Let = the cost of a half dozen cookies = the cost of a dozen cookies
Let = the cost of a loaf of bread
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(1) ( in cents )
(2) ( in cents )
Multiply both sides of (2) by and
subtract (1) from (2)
(2)
(1)
----------------------- cents
A loaf of bread costs $1.80
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check:
(1)
(1)
(1)
(1)
and
(2)
(2)
(2)
(2)
OK
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