z 2 y x In the equation above the numbers x y and z are ei

z / 2 = y/ x
In the equation above, the numbers x, y, and z are either positive or negative. What of the following must be equal to 4?

Solution

Cross multiply the given equation to get xz = 2y.

Multiplying both sides by 2 gives 2xz = 4y.

Finally, dividing both sides by y gives 2xz/y = 4

It\'s so easy :)