Answer:
$12 in 12 $1 bills
Step-by-step explanation:
Let the number of $1 bills be x.
Amount of money in $1 bills is $x.
Alejandro has twice as many $1 bills than $20 bills, then Alejandro has $20 bills.
Amount of money in $20 bills is
Alejandro has 3 times as many $20 bills in his wallet as he has $5 bills, then Alejandro has $5 bills.
Amount of money in $5 bills is
If he has a total of $142 in his wallet, then
Multiply this equation by 6: