A pair of linear equations which has a unique  solution x = 2, y = –3 is: 

(a)x + y = –1

(b) 2x + 5y = –11  2x – 3y = –5 4x + 10y = –22 

(c) 2x – y = 1

(d) x − 4y -14 = 0  3x + 2y = 0 5x - y − 13 = 0

MCQ from NCERT Exemplar - Chapter 3 Class 10 Maths - Teachoo - MCQs from NCERT Exemplar

part 2 - Question 12 - MCQs from NCERT Exemplar - Serial order wise - Chapter 3 Class 10 Pair of Linear Equations in Two Variables
part 3 - Question 12 - MCQs from NCERT Exemplar - Serial order wise - Chapter 3 Class 10 Pair of Linear Equations in Two Variables

Remove Ads

Transcript

Question 12 A pair of linear equations which has a unique solution x = 2, y = –3 is: x + y = –1, 2x – 3y = –5 (b) 2x + 5y = –11, 4x + 10y = –22 (c) 2x – y = 1, 3x + 2y = 0 (d) x − 4y − 14 = 0, 5x − y − 13 = 0 Since solving equations will take a lot of time We check which equations satisfy x = 2, y = −3 Option A x + y = –1 and 2x – 3y = –5 Here, x = 2, y = −3 is satisfied by 1st equation, but not the 2nd equation Hence, option (A) is incorrect Option B 2x + 5y = –11 and 4x + 10y = –22 Here, x = 2, y = −3 is satisfied by 1st equation, and the 2nd equation Hence, option (B) is correct Option C 2x – y = 1 and 3x + 2y = 0 Here, x = 2, y = −3 is not satisfied by 1st equation Hence, option (C) is incorrect Option D x − 4y − 14 = 0 and 5x − y − 13 = 0 Here, x = 2, y = −3 is satisfied by 1st equation, and the 2nd equation Hence, option (D) is also correct

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo