The sum of the ages of a mother and her son is 50 years. In five years, the mother will be three times her son's age. What is the son's current age?
Show answer & explanation
Correct answer: A
Explanation
Let the son's current age = x years.
Then the mother's age = 50 − x years.
After 5 years:
Mother's age = 55 − x
Son's age = x + 5
According to the question,
55 − x = 3(x + 5)
55 − x = 3x + 15
40 = 4x
x = 10