Hi,

Two years ago John was three times as old as Frank

Let x represent Franks's age and 3x John's age 'two years ago. 

Write as we Read***

3x + 7 = 2(x+7)

Solving for x

3x + 7 = 2x + 14

x = 7, Franks age two year ago. John was then 21

Right now, the sum of their ages: 9 + 23 = 32

checking our answer

23+5 = 2*14 = 28 

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