there is $250 in a wallet in $20 and $50 bills. how many of each bill is in the wallet if totally there is 8 bills

Question

We have to use variables to solve this.

Answer 1

Let x=the number of $20 bills

Let y= the number of $50 bills

x+y =8

20x + 50y = $250

therefore x=5 and y=3

If you substitute the values for x and y, your answer will equal $250.

To check yourself - look at the first equation x+y=8; think of the combinations you can use to add to 8 (7+1), (4+4), (5+3). By substituting the choices into the second problem, you will find that the only combination which satisfies both equations is 5 and 3.

Answer 2

T+F= 8

20T +50F = 250

20T +20F = 160

30F = 90

F=3 fifty dollar bills

T=5 twenty dollar bills