# Banknotes

$1390 was collected. How much was in$20 notes and how many in \$50 notes in that order? How many solutions exists?

Result

n =  3

#### Solution:

$1390=20x + 50y \ \\ x_{1}=62, y_{1}=3 \ \\ x_{2}=57, y_{2}=5 \ \\ x_{3}=52, y_{3}=7 \ \\ n=3$

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