The ages of two friends Ani and Biju differ by 3 years. Ani's father Dharam is twice as old as Ani and Biju is twice as old as his sister Cathy. The ages of Cathy and Dharam differ by 30 years. Find the ages of Ani and Biju.

From the pair of linear equations in the following problems and find their solutions (if they exist) by elimination method : The ages of two friends A and B differ by 3 years, A's father D is twice as old as A, and B is twice old as his sister C. The ages of C and D differ by 30 years. Find ages of A and B if A is elder than B.

Arjun is twice as old as Shriya. Five years ago his age was three times Shriya’s age. Find their present ages.

Present age of father is 42 years and his son 14 years.Find the ratio of: Age of father to the age of son when father was 30 years old.

Ankit is now 9 years older than Bobby.In 10 years, Ankit will be twice as old as Bobby was 10 years ago.Find their present ages.

Form the pair of linear equations in the following problems and find their solution by substitution method : Ten years ago, father was twelve times as old as his son and ten years hence he will be twice as old as his son will be. Find their present ages.

Two years ago a father was five times as old as his son. Two years later, his age will be 8 years more than three times the age of the son. Represent this situation algebraically and graphically .

From the pair of linear equations in the following problems and find their solutions (if they exist) by elimination method : If twice the son's age in years is added to the father's age, the sum is 70. But if twice the father's age is added to the son's age, the sum is 95. Find the ages of father and son.

Ram says to his son, 5 years ago, I was 7 times as old as you were and after 5 years I will be 3 times as old as you will be. Find their present ages.