Question

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.)

Answer 1

Answer:

Step-by-step explanation:

Let the cost of a notebook = Rs x    

  The cost of a pen = y    

       According to the condition, we have            

  [Cost of a notebook] = 2 × [Cost of a pen]          

i.e.            [x] = 2 × [Y]            

or              x = 2y            

or              x – 2y = 0      

Thus, the required linear equation is × – 2y = 0.

Answer 2

Answer:

x − 2y = 0

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

According to the question linear equation in two variable of the given statement is x − 2y = 0