13. A sum of 800 is in the form of denominations of 10 and 20. If the total number of
notes is 50, find the number of notes of each type.
Please solve this question and get 10 points don't send anything else otherwise I report your answer
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Answer:
20x +10(50-x) =800
x=30
so 20.notes of 10 and 30 notes of 20
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