Question

The cost of a notebook is twice the cost of a pen.Write a linear equation in two variables to represent this statement.

Answer 1

The cost of notebook = "x"
The cost of the pen = "2y"
(y x 2 because it is twice of the notebook)

=> x - 2y=0

hope helped you

Answer 2

take pen has X and notebook has y
x=twice
y=1y
so 2x-y=0