Find the equation of the plane with intercept 3 on the y - axis and parallel to ZOX plane.
We know that the equation of ZOX plane is y = 0 so a plane parallel to plane ZOX will have the equation y = constant
Now, it is given that the plane makes an intercept of 3 on y - axis so the value of constant is equal to 3.
Therefore, the equation of the required plane is y = 3.