What is the value of the expression 5x plus 12?

Answer 1

The answer heavily depends on the value of 'x' ... a piece of information that the

question neglects to mention.

Not only will the value of 'x' completely determine the value of the given expression,

but in addition, any change in the value of 'x' will cause a change in the value of the

expression instantaneously, in less than the Planck quantum of time, with not an iota

of propagation lag or latency whatsoever.