Question

(a) The cost of book is Rs.2 less than 3 times the cost of a pen. Express this statement as
variables. [take cost of a book= Rs. x and cost of a pen=Rs. y]​

Answer 1

Answer:

Let the cost of book be x and cost of pen be y.

According to your question

x = 3y - 2

x - 3y + 2 = 0

Hence your question was proved..

Answer 2

Answer:

3 times cost of pen =3y

Rs2 less than book= x-2

Result = 3y=x-2