Accounting: repayment of the principle on a loan used to finANCE the purchase of equipment should be...?

the repayment of the principal on a loan used to finance the purchase of equipment should be classified as a:

operating activity?
investing leisure?
financing activity?
or noncash transaction?

my homework question... im not sure what the answer is...
"> It is a financing entertainment.. When you obtained a loan, it was a financing amusement, when you purchased equipment, it was an investing activity

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