Answer :

[tex]2+ \frac{1}{6a} =-4\Leftrightarrow 6+\frac{1}{6a}=0\Rightarrow 36a=-1\Rightarrow a=-1/36[/tex]
[tex]2+ \frac{1}{6}a=-4 [/tex]

[tex] \frac{1}{6}a=-6 [/tex]

[tex]1a=-6*6[/tex]

[tex]a=-36[/tex]

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