[MATH] Method to reduce both sides of an equation?

[DarkWolf]

Just FYI, in computing 20 mod 50 = 20, not 70. Not sure if it's different in mathematics.

PHP Code:

<?php
for($i=0;$i<10;$i++)
{
    $out = ($i % 5) + 1;
    echo $i . " | " . $out . "\n";
} 


Yields:

Code:

0 | 1
1 | 2
2 | 3
3 | 4
4 | 5
5 | 1
6 | 2
7 | 3
8 | 4
9 | 5

Still not your solution, but it will produce non-scaled range of numbers.