NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: Algebra - Multiple Choice Questions

Question 7

Step-by-step check by substituting x = 2 in each option:

• Option A: (x + 2 = 5)

  Put (x = 2)

  (2 + 2 = 4)

  But the right side is (5). Since (4 eq 5), not a solution.

• Option B: (x - 2 = 0)

  Put (x = 2)

  (2 - 2 = 0)

  The right side is (0). Since (0 = 0), this is a solution.

• Option C: (2x + 1 = 0)

  Put (x = 2)

  (2 imes 2 + 1 = 4 + 1 = 5)

  The right side is (0). Since (5 eq 0), not a solution.

• Option D: (x + 3 = 6)

  Put (x = 2)

  (2 + 3 = 5)

  The right side is (6). Since (5 eq 6), not a solution.

Conclusion: Only Option B ((x - 2 = 0)) is true for (x = 2).