Hi Saurabh
Please check Ex 4.1, 1 of Chapter 4 Class 9 Linear Equations here https://www.teachoo.com/1108/422/Ex-4.1--1---The-cost-of-a-notebook-is-twice-cost-of-a-pen/category/Ex-4.1/
Written on Aug. 14, 2017, 7:01 p.m.
Hi Saurabh
Please check Ex 4.1, 1 of Chapter 4 Class 9 Linear Equations here https://www.teachoo.com/1108/422/Ex-4.1--1---The-cost-of-a-notebook-is-twice-cost-of-a-pen/category/Ex-4.1/
Written on Aug. 14, 2017, 7:01 p.m.