A vending machine has twice as many quarters in it as dollar bills. If the quarters and dollar bills have a combined value of $96.00 , how many quarters are in the machine?
Call N = the number of dollars 2N the number of quaters.....so we have
,25(2N) + 1N = 96
1.50N = 96
N = 96 / 1,50 = 64 dollars
2(64) = 128 quarters
