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Ex 4.1, 1 - The cost of a notebook is twice cost of a pen - Equations of form ax + by + c = 0

 

 

  1. Chapter 4 Class 9 Linear Equations in Two Variables
  2. Serial order wise
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Ex 4.1, 1 The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. (Take the cost of a notebook to be Rs x and that of a pen to be Rs y.) Let the cost of a notebook be Rs x and the cost of pen be Rs y It is given that Cost of notebook = 2 × Cost of pen x = 2y x − 2y = 0 x − 2y = 0 is the linear equation in two variables

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