NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: Algebra - Writing Expressions
Question 72

Question. 72

Write two equations for which 2 is the solution.

Answer:

3y + 4 = 10, 2x – 3 = 1

Detailed Answer with Explanation:

Idea: A “solution” of an equation is a number that makes the left side and the right side equal after we substitute it.

Given equations:
1) (3y + 4 = 10)    2) (2x - 3 = 1)

Check for (y = 2) in the first equation:

(3y + 4 = 10)

Put (y = 2)

(3 imes 2 + 4 = 10)

(6 + 4 = 10)

(10 = 10)  ✓ true

Check for (x = 2) in the second equation:

(2x - 3 = 1)

Put (x = 2)

(2 imes 2 - 3 = 1)

(4 - 3 = 1)

(1 = 1)  ✓ true

Conclusion: After substituting 2, both equations become true. So, 2 is a solution for each equation.

NCERT Exemplar Solutions Class 6 – Mathematics – Unit 7: Algebra – Writing Expressions | Detailed Answers