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21 February, 19:08

Today, the sum of the ages of Bea and her sister is 18. What would be the sum of their ages next year?

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  1. 21 February, 21:32
    0
    B=bea's age

    sister+b=18

    next years, both grew 1

    sister+1+b+1=18+1+1=20

    sum is 20
  2. 21 February, 22:34
    0
    Hello,

    Let's assume a the age of Bea

    b the age of her sister

    This year: a+b=18

    Next year (a+1) + (b+1) = (a+b) + (1+1) = (a+b) + 2=18+2=20
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