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5 August, 01:15

Mary is 5 years older than Bob. If the sum of their ages is 39, write and solve an equation to find their ages

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  1. 5 August, 01:34
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    Bob is 17 years old

    Mary is 22 years old

    Step-by-step explanation:

    Mary's current age: m

    Bob's current age: b

    m + b = 39

    m = b + 5

    Substitute.

    b + 5 + b = 39

    2b + 5 = 39

    2b = 34

    b = 17

    m = 22
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