introductory Algebra
posted by Julie .
A small slot machine holds 500 coins consisting of nickels, dimes, and quarters. The number of quarters is twice the number of dimes. If the value of all the coins is $88.00, how many nickels, were in the slot machine?

dimes  x
quarters  2x
nickels  500  x  2x or 5003x
10x + 25(2x) + 5(5003x) = 8800
solve for x, then found 5003x