Question

Write a linear equation in two variables to represent the given statements and also draw the graph for the
same.
(A) The cost of petrol in a city is Rs. 50 per liter
(B) The cost of 2 pencils and 3 erasers is Rs. 9
(C) Difference of two numbers is 13.
(D) Five years hence, father's age will be three times the age of his son. From the graph find father's age
when son is 6 years old​

Answer 1

Answer:

Correct option is

A

x=3y, where x= cost of a pen and y= cost of a pencil.

Let the cost of a pen be x and the cost of a pencil be y

According to the statement, cost of a pen is thrice the cost of a pencil

⇒x=3y

⇒x−3y=0 which is a linear equation in two variables