Hello. When I wash clothes my toilet and sink bubbles and fills with dirty water. I do not have a septic tank. How can I fix the problem? Please help!

Does this just happen when the wasjher starts its drain cycle? If so, your drain lie is partially blocked and needs to be rodded.

hello. when i wash clothes my toilet and sink bubbles and fills with dirty water. i do not have a septic tank. how can i fix the problem?. please help!
You have a partial blockage in your drain line that can not handle the added force and volume the washer pump puts out.
The solution would be to snake from the lavatory roof vent. Put out enough cable to reach the base and 25 feet more to get out into the main. Good luck, Tom