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QUESTION 15 A father is now thrice as old as his son Musa. Five years ago the sum of their ages was 58. Determine the age of the father when Musa was born.. 

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QUESTION 15 A father is now thrice as old as his son Musa. Five years ago the sum of their ages was 58. Determine the age of the father when Musa was born.

Let the present age of Musa be x. Therefore, the present age of the father is 3x. So we have,                                         Now                                       5 years ago Musa   :                      x    years                                (x-5) years Father :                      3x  years                                (3x-5) years   Sum of ages:                                                             58 years    This implies that,  (x-5) + (3x-5)  =  58                                 x-5 + 3x -5 =  58        x + 3x-5-5 =  58                 4x-10 = 58 	   4x = 68  	     x = 17. Therefore, the present age of Musa is 17 years and father is 51 years old. When Musa was born, the father was (51 – 17 ) years = 34 years.

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