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 ` x and that of a pen to be ` y).
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 ` x and that of a pen to be ` y).
Solution and Explanation
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.
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