A is elder to B by 2 years. A’s father F is twice as old as A and B is twice as old as his sister S. If the age of the father and sister differ by 40 years, find the age of A.

A is elder to B by 2 years. A’s father F is twice as old as A and B

1.	A is elder to B by 2 years. A’s father F is twice as old as A and B is twice as old as his sister S. If the age of the father and sister differ by 40 years, find the age of A.
Answer» The age of A is 26 years. We can solve such problems using methods to solve linear equations.