Question

EXERCISE 4.1
The cost of a notebook is twice the cost of a pen. Write a linear equation in two
variables to represent this statement.
and that of a pen to hey)​

Answer 1

Answer:

let the cost of the pen be x

let the cost of the notebook be y

equation-y=2x

Answer 2

coat of note= x

cost of pen= y

then x=2y

or, x- 2y=0