SOLUTION: John, eighteen years old, is three times as old as his brother. How old will John be when he is twice as old as his brother?

Question 823731: John, eighteen years old, is three times as old as his brother. How old will John be when he is twice as old as his brother?
Answer by faceoff57(108) (Show Source): You can put this solution on YOUR website!
John, eighteen years old, is three times as old as his brother. How old will John be when he is twice as old as his brother?
18 = 3x
6 = x
John is 18 years old
His brother is 6 years old
18 - 6 = 12
They are 12 years apart.
2 * 12 = 24
John will be 24 years old when he is twice his brother's age, 12 years old.

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