SOLUTION: Ken has $8.40 in nickels, dimes, and quarters. He has the same number of each coin. How many of each coin does he have?

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Question 611169: Ken has $8.40 in nickels, dimes, and quarters. He has the same number of each coin. How many of each coin does he have?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = number of dimes
Let +x+ = number of nickels
Let +x+ = number of quarters
given:
+840+=+5x+%2B+10x+%2B+25x+ ( in cents )
+840+=+40x+
+x+=+21+
He has 21 of each kind of coin