a bank teller has 54 in $5 and $20 bill s. the total value is $780. how many 5 dollars are there

Answer 1

34

Answer 2

X+y=54
5x+20y=780

-5(x+y=54)

-5x-5y=-270
5x+20y=780

15y=510
Y=34
X=20

5(20)+20(34)=780
Five dollars bills = 20

Answer 3

X+y=54
5x+20y=510