9th mathematics NCERT exercise questions with answers, Mathematics

Linear Equations in Two variables – Exercise 4.1 – Class IX

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). Solution: Let the cost of the notebook be ‘x’ and the cost of… Continue reading Linear Equations in Two variables – Exercise 4.1 – Class IX