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[tex]4(n - 3) + 2n = 12[/tex]
[tex]4n - 12 + 2n = 12[/tex]
[tex]6n - 12 = 12[/tex]
Add sides 12
[tex]6n - 12 + 12 = 12 + 12[/tex]
[tex]6n = 24[/tex]
Divide sides by 6
[tex] \frac{6}{6} n = \frac{24}{6} \\ [/tex]
[tex]n = 4[/tex]
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