Kitchen floor ceramic tile looks uneven in places. what do i do?

[Stephen N.]

ok, so I'm a rookie at this so do laugh at me for asking this.

I am trying to fix up a house to flip and the tile in the kitchen floor that was laid looks uneven in places. the lines are all strait but some of the tiles are higher than others.

My question is this. Is this something that can be fixed one tile at a time?