Variable Trace 1

Construct the variable trace and predict the output:

var x = 5, y = 2;
x = x + 2 * y;
y = 3 * x - y;
document.write(x + " " + y);
x = 5 * x;
y = y + 4;
document.write(x + y);

Variable Trace:       Output: 9 25 74
                     
    x       y       
--------+-------
    5       2
    9      25
   45      29
  
Variable Trace 2

var x = 1, y = 3;
if (x + y > 5)
{
    x = 2 * x + 3;
    y = 3 + x + 2;
    document.write(x + " " + y);
} 
else
{
    x = 3 * x + 1;
    y = 2 * x - 1;
    document.write(x + " " + y);
}
x = 5 * y;
y = 4 * x;
document.write(x + " " + y);

Variable Trace:                  Output:
    x       y     x + y > 5      4 7 35 140 
--------+-------+-----------
    1       3      false
    4       7
   35     140