<?php
$x=10; 
echo $x;
echo "<br />";

$y=20; 
$y += 100;
echo $y;
echo "<br />";

$z=50;
$z -= 25;
echo $z;
echo "<br />";

$i=5;
$i *= 6;
echo $i;
echo "<br />";

$j=10;
$j /= 5;
echo $j;
echo "<br />";

$k=15;
$k %= 4;
echo $k;
?>