Answer :

Division Property of Equality.
Always use opposite operation with side that contains variable.

Isolate variable.
Divide 4 by 4 to get it by itself.

Now do the same to other side.
[tex]12\div4=3\\x=3[/tex]
AL2006
12 = 4 x / / / Divide each side by 4. / / / 3 = x .

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