The Unique's Formula

Must to read this 

9X-7I  > 3(3X-7I)

<=> 9X-7I  > 9X-21U

<=> -7I  > -21U

<=> 7I  <  21U

<=> I  < 3U

<=>  I <3 U

Bacanya I <3 U ( r : I LOVE YOU) ahahaha :D