CBSE  /  Class 8  /  Maths  /  Linear Equations in One Variable

  • 1. 
    Of the following, the linear equation in one variable x, is

  • \(\frac{4}{x}\) = \(\frac{x}{4}\)
  • \(\frac{1}{x}\) + \(\frac{1}{x-1}\) = 1
  • \(\frac{x}{2}\) + \(\frac{x}{3}\) + \(\frac{1}{4}\)
  • x² + 2x + 3 = 0.

  • 2. 
    The degree of the equation x² - 2x + 1 = x² - 3 is

  • 1
  • 2
  • 0
  • 3.

  • 3. 
    The statement ‘on adding 10 in a number, the number becomes 20’ in the form of an equation is

  • x - 10 = 20
  • x + 10 = 20
  • 10x = 20
  • \(\frac{x}{10}\) = 20.

  • 4. 
    If 9 is added to a number, it becomes 2 This statement in the form of an equation is

  • x + 9 = 25
  • x - 9 = 25
  • 9x = 25
  • \(\frac{x}{9}\) = 25.

  • 5. 
    If 15 is subtracted from a number, it becomes -5. This statement in the form of an equation is

  • x + 15 = -5
  • x - 15 = 5
  • x + 15 = 5
  • x - 15 = -5.

  • 6. 
    Seven times a number is 42. This statement in the form of an equation is

  • x + 7 = 42
  • 7x = 42
  • \(\frac{x}{7}\) = 42
  • x - 7 = 42.

  • 7. 
    A number when divided by 5 gives 6. This statement in the form of an equation is

  • x - 5 = 6
  • x + 5 = 6
  • \(\frac{x}{5}\) = 6
  • 5x = 6.

  • 8. 
    A number when subtracted from 40 results into 15. This statement in the form of an equation is

  • 40 - x = 15
  • x - 40 = 15
  • 40 + x = 15
  • 40x = 15.

  • 9. 
    If 6 is added to 3 times of a number, it becomes 15. This statement in the form of an equation is

  • 3x + 6 = 15
  • 3x - 6 = 15
  • 3x + 15 = 6
  • \(\frac{3x}{6}\) = 15.

  • 10. 
    On subtracting 30 from two times a number, we get 56. This statement in the form of an equation is

  • 2x - 30 = 56
  • 2x + 30 = 56
  • 30 - 2x = 56
  • \(\frac{30}{2x}\) = 56.
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