Question:

Express Algebraically: Mary's age n years ago and m years from now, if she is 15 years old now.?

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Express Algebraically: Mary's age n years ago and m years from now, if she is 15 years old now.?

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  1. n yrs ago she was (15 -- n) yrs old

    m yrs from now she will be (15 + m) yrs old.

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