Ronny wants to calculate the mechanical advantage. He needs to determine the length of the effort arm and the length of the load arm. How can he find the length of the effort arm?

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.