Answer :

[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]

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