How Do I Fix My Sewer Line

The sewage is backing up a drain pipe in the house when we do laundry or take a shower and the water barely moves when we flush the toilet. How do we remedy this problem?

Once you get to a point where the water is backing up in multiple fixtures it means either the main sewer line from the house to the city sewer or septic tank has a blockage. Once these lines get filled, a small hand snake is ineffective. The same with chemical clog removers. You're way past that point. Right now you are at the stage where you need a professional to solve your sewer problems.