Tim picked up 243 pecans from under one tree and 145 pecans from another tree. which equation could tim use to find p, the number of pecans he picked up in all?

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.