SOLUTION: A box contains $8.00 in nickels,dimes,and quarters .There are three times as many nickels as quarters,and the number od dimes is 4 less than the number of nickels.How many of each

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Question 998200: A box contains $8.00 in nickels,dimes,and quarters .There are three times as many nickels as quarters,and the number od dimes is 4 less than the number of nickels.How many of each coin are there
So far I
have thought of an expression to represent the coins
3x-4( for the dimes)
3x(for the nickels)
x (for the quarters)

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
(x * 0.25) + (3x * 0.05) + ((3x - 4) * 0.10) = 8
0.25x + 0.15x + 0.30x - 0.40 = 8
0.70x = 8.40
x = 12
There are 12 quarters, 36 nickels and 32 dimes.