Question

The ratio x + y : x - y is equal to 2 : 1.
Write an equation for x in terms of y.

Answer 1

x=3y

Explanation:

ATQ

(x+y):(x-y)=2

or, x+y=2x-2y (crossmultiply)

or, 0= 2x-x-2y-y

or, x- 3y=0

or, x=3y is required equation