SOLUTION: dante has a total of php 120. if the number of 25 centavo is four more than thrice the number of 10 centavo coins, how many of each kind are there??

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Question 831749: dante has a total of php 120. if the number of 25 centavo is four more than thrice the number of 10 centavo coins, how many of each kind are there??
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
number of 10 centavo coins = n
the number of 25 centavo coins is four more than thrice the number of 10 centavo coins
number of 25 centavo coins = 3n+4
total of php 120.

0.10n + 0.25(3n+4) = 120
    10n + 25(3n+4) = 12000 
     10n + 75n+100 = 12000
           85n+100 = 12000
               85n = 11900   
                 n = 140 centavo coins

number of 25 centavo coins = 3n+4 = 3(140)+4 = 420+4 = 424 ten centavo coins.

Edwin