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In 4 years’ time, a mother will be three times as old as her son. Four years ago she was five times as old as her son. Find their present ages.

Solution

In 4 years’ time, a mother will be three times as old as her son. Four years ago she was five times as old as her son. Find their present ages.

Solution

Mother^{'} s age is : 44

Boy^{'} s age is : 12

Solution steps

Translate the problem into an equation:

x + 4 = 3 (y + 4), x - 4 = 5 (y - 4)

x + 4 = 3 (y + 4), x - 4 = 5 (y - 4) : x = 44, y = 12

Mother^{'} s age is : 44

Boy^{'} s age is : 12

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