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7 March, 21:47

There are 3 children in a family named Lisa, Susan, and John. If Lisa is 5 years older than her sister, Susan, and if John is 7 years older than Lisa, and the total of the ages of all 3 children is 50, then how old is Susan

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  1. 7 March, 21:51
    0
    Lisa: 16

    Susan: 11

    John m: 23

    Step-by-step explanation:

    Susan: s

    Lisa: s+5

    John: s+5+7 = s+12

    s + s+5 + s+12 = 50

    3s + 17 = 50

    3s = 33

    s = 11

    s+5 = 16

    s+12 = 23
  2. 7 March, 22:08
    0
    Susan is 8
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