Question

the cost of a notebook is twice the cost of a pen. write a linear equation in two variable to represent this statement​

Answer 1

Answer:

take the cost of pen as X

take cost of notebook as 2x

Step-by-step explanation:

x + 2x =sum of both

Answer 2

Answer:

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