The common One way to wash your clothes here is to use a laundry sink with a washboard and wash everything piece by piece. Where drying is concerned, a basic indoor clothes line is used (usually located in a small laundry room). Washing machines are available for purchase but the majority don’t buy them and almost everyone has one (see comments). Dryers seem non-existant. In terms of underwear, everyone must do their own and when a washing machine is available, underwear generally doesn’t go in with the rest of the clothes.
Quite possible other methods or variations are utilized but in general this is how it is.
It is very hard to find a house or apt that doesn’t have (or does not include access to) a washing machine and dryer. One would be hard-pressed to find clothes lines.