Can I hook up a sink and washing machine drain to my toilet drain pipe? I have a toilet in my basement with no sink

Can I hook up a sink and washing machine drain to my toliet drain pipe? I have a toliet in my basement with no sink

Yes you may cut into the toilet drain line with a wye. Be advised that you will need to vent the sink and if you plan on a separate washer station,(instead of draining the washer into the sink)that will have to be vented as well. You may combine the two vents and revent them back in the attic to a existing roof vent. Good luck and thank you for rating my answer. Tom