How do I solve the coin problem?

Help on an elimination problem in algebra?

  • I have an algebra problem: You have a coin collection of nickels and dimes. You have 22 coins worth $1.70. How many of each coin do you have? Solve using elimination. I set up the system like this: n + d=22 5n + 10d=1.70 I changed the first problem to: -10n + -10d=-220 but when i tried adding the two and solving the problem i kept getting weird negative answers. Can someone solve it and tell me what they got?

  • Answer:

    12 dimes, 10 nickels.

Addie G. at Yahoo! Answers Visit the source

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12 dimes, 10 nickels.

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