\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
A person starts walking at a constant speed of \(5\) kilometers per hour from a starting point that is \(10\) kilometers away from their destination. Let \(x\) be the number of hours they have been walking. Find \(f(x)\) be the distance remaining to their destination in kilometers.
\(f(x) =\)
kilometers