NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: Algebra - Problems and Solutions

Question 96

Let Sunita’s present age be (x) years.

Geeta is twice Sunita’s age, so Geeta’s present age is (2x) years.

(i) Ages after 4 years

• Sunita’s new age = present age + 4
  (x) + (4) = (x + 4)
• Geeta’s new age = present age + 4
  (2x) + (4) = (2x + 4)

(ii) Ages 3 years ago

• Sunita’s past age = present age − 3
  (x) − (3) = (x - 3)
• Geeta’s past age = present age − 3
  (2x) − (3) = (2x - 3)

Summary:

• After 4 years: Sunita (x + 4), Geeta (2x + 4)
• 3 years ago: Sunita (x - 3), Geeta (2x - 3)