Answer 1

var x = 10;
x*=2 // x = 20

while loop start

First itration
x < 30 true // x = 20
x+=5 // x = 25
y = x // y = 25

Second itration
x < 30 true // x = 25
x+=5 // x = 30
y = x // y = 30

Third itration
x < 30 false // x =30

FInal x = 30, y = 30
alert (x+y) // 60

Answer 2

x = y = 30 in this code.