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18 July, 09:50

Laura is four years less than twice her son's age. The sum of their ages is 119. How old is Laura? How old is her son?

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  1. 18 July, 09:58
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    L=Laura's age, S=sons age

    L=2s-4

    L+S=119

    => L=119-S

    119-S = 2s-4

    119+4=3s

    123=3s

    s=41 implies L=78

    78+41=119

    and 78=2*41-4

    therefore Laura is 78 and her son is 41
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