Question 274991: Andy has 21 coins made up of quarters and half dollars, and their total value is $6.50. How many quarters does he have? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = number of quarters
Let = number of half dollars
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given:
(1)
(2) (in cents)
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Multiply both sides of (1) by
and subtract from (2)
(2)
And, since
(1)
There are 16 quarters and 5 half dollars
check:
(2)
OK
