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26 May, 14:01

Martin is 6 years younger than his sister. The sum of their ages is no more than 22 years. What is an inequality that can be used to represent this situation where X represents martins sisters age

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  1. 26 May, 15:00
    0
    Let n be Martin's sister's age. Then Martin is n-6. So:

    n+n-6≤22

    2n≤28

    n≤14

    n-6≤8

    The oldest Martin's sister can be is 14.
  2. 26 May, 17:24
    0
    sisters age = x

    martins age = x-6

    equation: x + (x-6) <=22

    2x - 6 <=22

    2x<=28

    x< = 28/2

    x< = 14
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