Question

Cost of book is 1/3 the cost of a pen write a linear equation

Answer 1

Answer:

3x - y = 0

Step-by-step explanation:

let cost of book = x

let cost of pen = y

1/3y=x

y= 3x

3x - y = 0

Answer 2

Answer:

x=1/3*y

Step-by-step explanation:

let cost of book be x

let cost of pen be y

according to question

cost of book=1/3 of cost of pen

so, x=1/3*y

hope it helps you