Asked by Anonymous

Every day when Lisa returns from school, she puts her change from buying lunch into a jar on her dresser. This weekend she decided to count her savings.

She found that she had 72 coins, all nickels and dimes. The total amount was $4.95. How many coins of each type did she have?

Be sure to explain how you found your answer.
Please help explain to me
Answered by PsyDAG
N = 72 - D

10D + 5N = 4.95

Substitute 72-D for N in the second equation.

10D + 5(72-D) = 4.95

Solve for D, then put value in the first equation to find N.
Answered by Coder
It's 27
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