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?
+36915 x = number of dollar bills 2x = number of quarters (given)
1.00 x + .25 (2x) = 96.00
1.5 x = 96
x = bills = 64 then quarters = 128
