Homework Help: math

Posted by carol on Monday, May 2, 2011 at 8:10pm.

Joe has a collection of nickels and dimes that is worth $8.55. If the number of dimes was tripled and the number of nickels was decreased by 2, the value of the coins would be $23.45. How many nickels and dimes does he have?

math - Mgraph, Monday, May 2, 2011 at 8:20pm
Solve the system

10D+5N=855
30D+5(N-2)=2345

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