[tex]8x=56[/tex]
[tex]x=7[/tex]
[tex]7x=42[/tex]
[tex]x=6[/tex]
[tex]6x=30[/tex]
[tex]x=5[/tex]
[tex]5x=20[/tex]
[tex]x=4[/tex]
From these numbers, you can see there is a pattern. You have to multiply your first number by another number that decreases by one each time.
Knowing this, you can solve for what 3 equals.
[tex]3(4-1)[/tex]
[tex]3(3)[/tex]
[tex]9[/tex]
[tex]3=9[/tex]