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<!-- LinearEquation.php -->
<center>
<font color=blue>
<H2>
The Linear Equation Form : ax+b = 0
</H2>
<?php
$a = $_POST['aVar'];
$b = $_POST['bVar'];
// debugging
if($a == 0)
{
print "No real root.";
}
else if($a != 0)
{
$x = -$b/$a;
$x = number_format($x, 2);
print "Root: $x";
}
?>
</font>
</center>