"I eat a sandwich without cheese."
Translation:Jag äter en smörgås utan ost.
If anyone else has this question: I found the answer here: https://forum.duolingo.com/comment/5938554:
There the question was if "Hon dricker inte öl utan kaffe." can't mean "She doesn't drink beer without coffee." or how one would say this and the answer is:
"It would be the same, but the stress pattern would be a bit different in speech. If you see it in writing, you have to judge from what seems reasonable. In a sentence like this, it's more likely that it would mean "but" (we accept the other version too though), but if it were "Hon dricker inte kaffe utan socker" it could hardly mean "but", since people usually don't drink sugar."