Question 1097751: Last year, Tom was 15 years old and his brother John was 3. In how many years will Tom be three times as old as his brother John? Found 2 solutions by ikleyn, MathTherapy:Answer by ikleyn(52775) (Show Source):
Tom is 16 years old now.
His brother John's age is 4 years now.
Let x = "In how many years", the value under the question.
Then
16 + x = 3*(4+x).
It is your major equation to solve.
16 + x = 12 + 3x ====> 4 = 2x ====> x = = 2.
Answer. In 2 years.
Check. In 2 years, Tom will be 16+2 = 18 years old, while John's age will be 4+2 = 6 years. The condition is satisfied.
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Last year, Tom was 15 years old and his brother John was 3. In how many years will Tom be three times as old as his brother John?
