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

Correct answer:

n =  3

Step-by-step explanation:

1390 = 20x + 50y x1=62, y1=3 x2=57, y2=5 x3=52, y3=7 n=3

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