SOLUTION: How do you get $180 using 12 bills With only 5$ and 20$ dollar bill ?

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Question 453752: How do you get $180 using 12 bills
With only 5$ and 20$ dollar bill ?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=12
5x+20y=180
5x+5y=60
15y=120
y=8
x=4
There are 4 $5 bills are 8 $20 bills..