Class 9 Linear Equations in Two Variables NCERT Solutions
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Questions and Answers

Which of the following equations is NOT a linear equation?

  • $x^2 + 3x - 7 = 0$ (correct)
  • $4y - 2 = 3x$
  • $5x - 2y = 7$
  • $2x + 3y = 5$

    • What is the defining characteristic of a linear equation?

  • Includes variables raised to powers greater than 1
  • Cannot involve more than two variables
  • Always has exactly one solution
  • Power of the variable is always 1 (correct)

    • Which of the following equations is a linear equation in two variables?

  • $xy = 8$
  • $x^2 + y^2 = 1$
  • $3x - y = 7$ (correct)
  • $4x - 5 = 2y$

    • If $4x + 5y = 20$, what is the value of $y$ when $x = 3$?

    <p>$3$</p> Signup and view all the answers

    How many solutions can a consistent system of linear equations in two variables have?

    <p>Infinite solutions</p> Signup and view all the answers

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