Question 654965
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Hi,
Anna is 54 years old and her mother, Clara is 80. 
How many years ago{{{highlight(x)}}} was her mother, three times the age of her daughter, Anna?
   80-x = 3(54-x)
   80 - x= 162 - 3x
       2x = 82
        x = 41
and
 {{{80-41 = 39 = 3(54-41) = 3*13 = 39}}}