Alvin is 11 years older than Elga. The sum of their ages is 71 . What is Elga's age?

math!

16 Answers

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  • 1 year ago

    ley x - Alvis age

    let y Elgas age

    x = y + 11 eq1

    x + y = 71 eq2

    plug in eq1 to eq2

    y + 11 + y = 71

    2y + 11 = 71

    2y = 71 - 11

    2y = 60

    y =30 <----------Elgas age

    Therefore, Elga's age is 30...Answer//

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  • 1 year ago

    A + E = 71

    A = E + 11

    Hence

    E = A - 11

    Substitute

    A + (A - 11) = 71

    2A = 82

    A = 42

    E = 31

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  • 1 year ago

    Let A and E be Alvin's and Elga's ages respectively.

    A= E + 11

    A + E = 71

    A-E=11

    2A=82

    A=41

    41+E=71

    E=30

    Elga is 30.

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  • Sky
    Lv 7
    1 year ago

    I figured it out in my head in less than 10 seconds. If I can do it, you can do it.

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  • 1 year ago

    If you took away the 11 year difference they would be the same age and the sum would be 60. Hence Elga is half that or 30.

    Answer:

    Elga is 30 (and Alvin is 41)

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  • 1 year ago

    A + E = 71 and A - E = 11 so E = (71 - 11)/2 = 30

    Elga is 30 years old.

    • Φ² = Φ+1
      Lv 7
      1 year agoReport

      Thank you for asking this question. Now that over a month has passed, can you please award the Best Answer to whichever answer you find most deserving?

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  • keerok
    Lv 7
    1 year ago

    Elga = x

    Alvin = x+11

    x+x+11 = 71

    2x+11 = 71

    2x = 71-11

    2x = 60

    x = 60÷2

    x = 30

    • Lv 7
      1 year agoReport

      You idiot - you'e showing off and at the same time you're helping someone cheat on their homework. What's wrong with you?

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  • 1 year ago

    Alvin is 11 years older than Elga.

    The sum of their ages is 71.

    A + E = 71

    A - E = 11

    A = 41, E = 30

    Elga is 30 years old.

    • Lv 7
      1 year agoReport

      You idiot - you'e showing off and at the same time you're helping someone cheat on their homework. What's wrong with you?

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  • 1 year ago

    Elga is 30.

    Thumbs down? Are you stupid?

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  • oubaas
    Lv 7
    1 year ago

    A-E = 11

    A+E = 71

    adding them up :

    2A = 82

    A = 41

    E = 41-11 = 30

    • oubaas
      Lv 7
      1 year agoReport

      How dare you talk to me like that ??? Mind your own business...

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