Question 1194275
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<pre>

Their respective ages now are  x+6  and  x  years.


In 3 years


    (x+6) + 3 = 2(x+3)

    x + 9 = 2x + 6

    9 - 6 = 2x - x

      3   =    x.


<U>ANSWER</U>.  Sophie is 3 years old;  Thandi is 3+6 = 9 years old.
</pre>

Solved.


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