SOLUTION: Cheryl has 20 coins worth $3.15. If the coins are dimes and quarters only, how many of each type of coin does she have?

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Question 33651This question is from textbook Algebra and Trigonometry Structure and Method
: Cheryl has 20 coins worth $3.15. If the coins are dimes and quarters only, how many of each type of coin does she have? This question is from textbook Algebra and Trigonometry Structure and Method

Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
If Cheryl has x quarters, she would have (20-x) dimes.
So, 25x + (20-x)(10) = 315
=> 25x+200-10x = 315
=> x = 115/15
Since x is not an integer, the question is erroneous.