The girls in karen’s family own a total of 46 t-shirts. the oldest, heidi, has 18 t-shirts. karen has six times as many t-shirts as her little sister, june. how many t-shirts does karen own?

Torino out how many t-shirts Karen has, first, subtract 18 from 46.
46-18=28

Now, what I would do here is guess-and-check. Whatever number of t-shirts Karen's little sister has, Karen has 6 times more.

If Karen's little sister had 4 t-shirts, then Karen would have 24 t-shirts. 4+24=28
Karen has 24 tshirts

I'm just guessing, but my answer would c. 0 to 300.