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A father is currently 21 years older than his son. In 8 years he will be twice as old as his son. What are their present ages?

Solution

A father is currently 21 years older than his son. In 8 years he will be twice as old as his son. What are their present ages?

Solution

Father^{'} s age is : 34

Boy^{'} s age is : 13

Solution steps

Translate the problem into an equation:

x + 8 = 2 (x - 21 + 8)

Solve for

x, x + 8 = 2 (x - 21 + 8) : x = 34

Find age

Father^{'} s age is : 34

Boy^{'} s age is : 13

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