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28 July, 23:56

Alvin's age is two times Elga's age. The sum of their ages is 63. What is Elga's age?

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  1. 29 July, 01:28
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    Answer: Alvin = 42 yrs, Elga = 21 yrs

    Step-by-step explanation:

    Let Elga's age be x, and Alvin's age be y, since Alvin is two times Elga's age, then

    Alvin's age = 2x, that is

    y = 2x ... equation 1

    The sum of their ages is 63 implies

    x + y = 63 ... equation 2

    Solving the resulting linear equations by substitution method.

    Substitute equation 1 into equation 2, we have

    x + 2x = 63

    3x = 63

    x = 63/3

    x = 21

    Therefore : Elga is 21 years old, then Alvin will be 21 x 2, which will be 42
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