7. Ansa bill at a clothing store came to $168.78 (no tax she bought shirts for $9.95 each, 2 dresses for $29.98 each and 2 pairs of jeans, the jeans cost the same amount as each other, how much was each pair?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.