Gina has $72 in $1 bills, $5 bills, and $20 bills. If she has three times as many $1 bills as she has $5 bills, and only half as many $20 bills as $5 bills, how many of each type of bill does each have?
Total number of bills Gina has = $72 Let the number of $5 bills =X Number of $1 bills = 3X Number of $20 bills = X/2 Then X+3X+X/2=72 4X+X/2=72 8X/2+X/2=72 9X/2=72 X=72*2/9 X=16 So The number of $5 bills = 16 The number of $1 bills = 48 The number of $20 bills = 8
