arithmetic

Steve's mom's age is 7 years less than 3 times Steve's age. The sum of their ages is 65 years. Find their ages.

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  1. Let s = Steve's age.

    s + (3s - 7) = 65
    4s - 7 = 65
    4s = 72
    s = 18

    Check:

    Steve is 18
    His mom is (3 * 18) - 7 = 54 - 7 = 47

    14 + 47 = 65

    Yep.

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  2. 18 + 47 = 65

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  3. Let M = mom's age
    let S = steve's age.

    M+S = 65
    3S = M+7
    solve for M and S.
    Check my thinking.

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  4. Steves mom is 47 and Steve is 18

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