Question 526168
Jonathan saved nickles and quarters. he had a total of twenty coins whose value was $1.80. how many of each kind of coin did he have?
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n + q = 20 (# of coins)
5n + 25q = 180 (value of coins)
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n + q = 20 (# of coins)
n + 5q = 36 (2nd eqn divided by 5)
---------------------- Subtract
-4q = -16
q = 4 quarters
n = 16 nickels