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In 3 years Alex will be 3 times as old as his sister Precy (is now):

a+3 = 3p

a = 3p-3

A year ago Ales was 2 times as old as Precy (is now):

a-1 = 2p

a = 2p+1

3p-3 = 2p +1

3p = 2p +4

p = 4

Precy is 4

a = 2p + 1 or 3p - 3

a = 8 +1 or 12 - 3 = 9

Alex is 9

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Q: In 3 years Alex will be 3 times as old as his sister Precy a year ago Alex was times as old as Precy How old are they now?
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