Problema Solution
A Bank teller has 54 $5 and $20 bills in her cash drawer. The value of the Bills is $780. How many $5 bills are there?
Answer provided by our tutors
x--> number of $5
y__> number of $20
x+y = 54
x=54-y
5x+20y =780
5(54-y)+20y =780
270-5y+20y=780
15y=510
y=34
x=54-34
x=20
Number of $5 =20
number of $20 =34