How can i replace a ranked page with another page?

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.

Wait a few days, Google will update soon

how long google will update my url?
how long i must redirect 301 to new page?after google update,can i remove 301 redirect?

mohsenunlimited said:

how long google will update my url?
how long i must redirect 301 to new page?after google update,can i remove 301 redirect?

Click to expand...

If you have links pointing to mydomain/x and you want them to be counted towards mydomain/y, then you will need to keep the 301 redirect indefinitely (forever).

Also Re-Index those back-links where you already changed the new targeted url. In this way you'll get more effective Result because then Google bot will know that those links-back are now pointing towards new page (y).