Ex 4.1, 1 - Chapter 4 Class 9 Linear Equations in Two Variables

Last updated at August 14, 2026 by

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

 

 

Remove Ads
Teachoo · Class 9 Explore Class 9

Transcript

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

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.