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anonymous

  • one year ago

Lana is the oldest of four sisters. Her youngest sister is half her age. The other two sisters are twins 2 years younger than Lana. When the four sisters' ages are added together, the result is 45. If the youngest sister is n years old, what is n? will give meadel

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  1. anonymous
    • one year ago
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    I will give a medal

  2. anonymous
    • one year ago
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    If the youngest sister is \(n\), then the oldest is \(2n\) because the youngest sister is half her age.

  3. Kash_TheSmartGuy
    • one year ago
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    http://52.0.184.118/updates/53f75c68e4b0ae4669f46685 -link might help you!

  4. anonymous
    • one year ago
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    Then two sisters are twins and they are 2 years younger than Lana.

  5. anonymous
    • one year ago
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    We know Lana is \(2n\), so the two sisters are both \(2n-2\).

  6. anonymous
    • one year ago
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    Set up the equation. Lana+ twin +twin+youngest =45

  7. anonymous
    • one year ago
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    so what age is the youngest?

  8. anonymous
    • one year ago
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    The youngest is n. I put that first. Read it.

  9. anonymous
    • one year ago
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    so what is n?

  10. anonymous
    • one year ago
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    \[2n+2n-2+2n-2+n=45\]Now solve for n.

  11. anonymous
    • one year ago
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    I don't give out answers. YOU work for it.

  12. anonymous
    • one year ago
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    so is it 7n-4?

  13. anonymous
    • one year ago
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    Yes, but you need to find for n, right?

  14. anonymous
    • one year ago
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    so 7n-4=5

  15. anonymous
    • one year ago
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    \[\huge 7n-4=45\]

  16. anonymous
    • one year ago
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    Add 4 on both sides. Then divide 7 on both sides.

  17. anonymous
    • one year ago
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    so it is 7?

  18. anonymous
    • one year ago
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    yes

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