# Math Help - System of Equations/ Matrix help??

1. ## System of Equations/ Matrix help??

I need help find the three equations out of this:

Code:
A piggy bank contains 50 coins, all of them nickels, dimes, or quarters. The total value of coins is $5.60 and the value of the dimes is five times the value of the nickels. How many of each type are there? I should be able to use system of equations or matrices to do this, but I'm not able to pull out the equations. Any help? 2. ## Re: System of Equations/ Matrix help?? A piggy bank contains 50 coins, all of them nickels, dimes, or quarters. n + d + q = 50 The total value of coins is$5.60
5n + 10d + 25q = 560

the value of the dimes is five times the value of the nickels
10d = 5(5n)

3. ## Re: System of Equations/ Matrix help??

Thank you very much. Got it now!

q=10,d=30,n=12