SOLUTION: ramon has ​₱ 3.80 in 5 � and 10 �. he has a total of 30 coins how many of each coin does he have

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Question 996131: ramon has ​₱ 3.80 in 5 � and 10 �. he has a total of 30 coins how many of each coin does he have
Answer by CubeyThePenguin(3113) About Me  (Show Source):
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n = number of 5 cent coins
d = number of 10 cent coins


5n + 10d = 380
n + d = 30

Multiply the second equation by 5.

5n + 10d = 380
-(5n + 5d = 300)
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5d = 80
d = 16

There are 14 nickels and 16 dimes.