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

  • a)
    x + y = -1; 2x - 3y = -5

  • b)
    x - 4y - 14 = 0; 5x - y - 13 = 0

  • c)
    2x - y = 1 ; 3x + 2y = 0

  • d)
    2x + 5y = -11; 4x + 10y = -23 

Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A pair of linear equations which has a unique solution x = 2, y = - 3 ...
x - 4y -14 = 0


x = 4y+14


putting this in 5x - y -13 = 0


5(4y+14) - y -13 =0


19y = -57     


y = -3


putting y = -3 in x = 4y+14


x = 4(-3)+14


x = 2


so option b is correct
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Community Answer
A pair of linear equations which has a unique solution x = 2, y = - 3 ...
I think the question is wrong because a1/a2= b1/b2 in this option (B)and we know that for having a unique solution a1/a2 must not be equal to b1/b2
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A pair of linear equations which has a unique solution x = 2, y = - 3 isa)x + y = -1; 2x - 3y = -5b)x - 4y - 14 = 0; 5x - y - 13 = 0c)2x - y = 1 ; 3x + 2y = 0d)2x + 5y = -11; 4x + 10y = -23Correct answer is option 'B'. Can you explain this answer?
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A pair of linear equations which has a unique solution x = 2, y = - 3 isa)x + y = -1; 2x - 3y = -5b)x - 4y - 14 = 0; 5x - y - 13 = 0c)2x - y = 1 ; 3x + 2y = 0d)2x + 5y = -11; 4x + 10y = -23Correct answer is option 'B'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about A pair of linear equations which has a unique solution x = 2, y = - 3 isa)x + y = -1; 2x - 3y = -5b)x - 4y - 14 = 0; 5x - y - 13 = 0c)2x - y = 1 ; 3x + 2y = 0d)2x + 5y = -11; 4x + 10y = -23Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A pair of linear equations which has a unique solution x = 2, y = - 3 isa)x + y = -1; 2x - 3y = -5b)x - 4y - 14 = 0; 5x - y - 13 = 0c)2x - y = 1 ; 3x + 2y = 0d)2x + 5y = -11; 4x + 10y = -23Correct answer is option 'B'. Can you explain this answer?.
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