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A boy is 10 years older than his brother. In 4 years, he will be twice as old as his brother. Find the present age of each.

Solution

A boy is 10 years older than his brother. In 4 years, he will be twice as old as his brother. Find the present age of each.

Solution

Boy^{'} s age is : 16

Brother^{'} s age is : 6

Solution steps

Translate the problem into an equation:

x + 4 = 2 (x - 10 + 4)

Solve for

x, x + 4 = 2 (x - 10 + 4) : x = 16

Find age

Boy^{'} s age is : 16

Brother^{'} s age is : 6

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