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The sum of the ages of John and Mary is 32. Four years ago, John was twice as old as Mary. Find the present age of each.

Solution

The sum of the ages of John and Mary is 32. Four years ago, John was twice as old as Mary. Find the present age of each.

Solution

John^{'} s age is : 20

Mary^{'} s age is : 12

Solution steps

Translate the problem into an equation:

x - 4 = 2 (32 - x - 4)

Solve for

x, x - 4 = 2 (32 - x - 4) : x = 20

Find age

John^{'} s age is : 20

Mary^{'} s age is : 12

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