Erin has a total of 20 bills, all of which are $10 bills and $20 bills. If her $10 bills were $20 bills and her $20 bills were $10 bills, her bills would total $100 more. How much does Erin have in $10 bills?
Erin has a total of 20 bills, all of which are $10 bills and $20 bills. If her $10 bills were $20 bills and her $20 bills were $10 bills, her bills would total $100 more. How much does Erin have in $10 bills?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Erin has a total of 20 bills, all of which are $10 bills and $20 bills. If her $10 bills were $20 bills and her $20 bills were $10 bills, her bills would total $100 more. How much does Erin have in $10 bills?
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