You can put this solution on YOUR website! $2 bills be x
$ 5 bills = x+12
..
Total value = $137
..
2x+5(x+12)=137
2x+5x+60=137
7x+60=137
subtract 60 from both sides
7x=137-60
7x=77
/7
x= 11 , the number of $2 bills
$ 5 bills will be x+12 = 11+12 =23
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m.ananth@hotmail.ca