Question

A man is 36 years old and his son is one-fourth as old as him. In how
many years will the son be four-seventh as old as his father ?​

Answer 1

Answer:

9+n/36+n=4/7

Step-by-step explanation:

The man is 4x older than the son, so the son is 9. Let n be the interval between now and when the son is 4/7ths the father’s age