Variadic Templates and RValue refs

Consider the following C++ code

template <class... Args>
void f (const int x, const int y, Args&&... args) {
  // Do something
}

As far as I understand,Args here could either be lvalue or rvalue references, depending on the type deduction at compile time.

So, I should be able to call the function using -

float x = 40.0;
f<int, float, double>(10, 20, 30, x, 50.0);

This gives me an error saying that it could not cast x from type float to type float&&.

How do I define a function with a variadic template that accepts both lvalue and rvalue references.