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The Cost of a Notebook is Twice the Cost of a Pen. Write a Linear Equation in Two Variables to Represent this Statement. - Mathematics

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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).

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Solution

Let the cost of a notebook and a pen be x and y respectively.

Cost of notebook = 2 × Cost of pen

x = 2y

x − 2y = 0

Concept: Linear Equation in One Variable
  Is there an error in this question or solution?

APPEARS IN

NCERT Class 9 Maths
Chapter 4 Linear Equations in two Variables
Exercise 4.1 | Q 1 | Page 68

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