SOLUTION: Some dimes and pennies are in a stack. They have a total value of $2.31. How many dimes are in the stack if there are twice as many dimes as pennies?

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Question 32410: Some dimes and pennies are in a stack.
They have a total value of $2.31.
How many dimes are in the stack if there are twice as many dimes as pennies?
Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
Pennies = x
Dimes = 2x
2x(10) + x = 231
=> 21x = 231
=> x = 11
Pennies: 11 and dimes 22