hello. i have a website with good google ranking. recently i get top in Serps on page 1 with this address: mydomain/x but i changed my page and i want my webpage (in google) , change to mydomain/y note that each pages(x and y) are similar (with same title/similar content). i bought and build some links for address x.also i redirect(301) my page(x) to page y. also i changed all previous and controllable backlinks to new url. and all new backlinks have new url. but my previous page still in google top position. plz guide me. thanks.