I wrote "mutattok egy házat" and it is not accepted. I ment the 2nd person plural ...
I think you should report it.
Same here. "Mutattok egy házat." is still not accepted. Why?
Why can't it be: "Te mutatsz egy házat?"
It can be, if you want to emphasize "you". It should be accepted.
Is egy required in this sentence?
It is not required, but saying egy is also not wrong
I said "Mutatsz házat" and it said I was wrong, isn't "egy" not mandatory?
You're right that should be accepted
Why is the verb now put at the start?
Why házat and not ház if it is a singular house?
Because it's the direct object of the verb show, so it gets the accusative case ending -t.
If it were multiple houses, it would also have the plural ending -k :)
köszi. I have a lot to learn!