SOLUTION: A money box contains only 10 and 20 cent coins their are only 19 coins with the total of 3 dollars 10 how many 10 cent coins

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Question 882562: A money box contains only 10 and 20 cent coins their are only 19 coins with the total of 3 dollars 10 how many 10 cent coins
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
20x + 10(19-x) = 310 (IF 310 cents is what You meant)
10x = 120
x = 12, the number of 20 cent coins. Number of 10 cent coins is 7 19-12