Subject :IMO Class : Class 9

The cost of a note book is twice the cost of a pen. If the cost of a note book is
*x* and that of a pen is ₹ *y*, then a linear equation in two variables to represent the given condition is ______.

A *x* + 2*y* = 0

B *x* – 2*y* = 0

C 2*x* + *y* = 0

D 2*x* – *y* = 0

2y = x therefore 2y - x and x - 2y both are = 0