Two gymnasts are running toward each other in a floor routine, and they plan to precisely time a flip to stay synchronized for the audience. The path of the gymnasts is parabolic and modeled by the following equations, where y is the height of the flip and x is the time in seconds:

y = – (x – 5)2 + 3

y = –3(x – 6)2 + x + 1

To make sure the flip is in unison, after how many seconds should the flip occur?