Question

If x and y and are positive numbers such that x/y = 2/3 and xy = 216, what is x + y?

Answer 1

Answer:

x/y=2/3

x=2y/3

substitute in xy=216 we get,

2y^2/3=216

y^2=324

y=18

substitute in any one equation

x=12

x+y=30