Question 629734
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Hi,
Mona's father is thrice as old as Mona age {{{highlight(x)}}} 
After 12 years ,he will be just twice his daughter's age
Question states*** In 12 years ...
  3x + 12 = 2(x+12)
       x = 12, Mona's age.  her father is 36

and..in 12 years
    {{{48 = 2*24}}}