The combined area of two squares is 45 square cm. each side of one square is twice as long as the side of the other square. what is the length of each side of the larger square?

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.