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Popular >

Chris is twice as old as Don. Next year, the sum of their ages will be four times as much as Don's age last year. Find their present ages.

Solution

Chris is twice as old as Don. Next year, the sum of their ages will be four times as much as Don's age last year. Find their present ages.

Solution

Don^{'} s age is : 6

Chris^{'} s age is : 12

Solution steps

Translate the problem into an equation:

2 x + 1 + x + 1 = 4 (x - 1)

Solve for

x, 2 x + 1 + x + 1 = 4 (x - 1) : x = 6

Find age

Don^{'} s age is : 6

Chris^{'} s age is : 12

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