Solve this equation, if answer is guessed ill report your response

Answer:
The first one is
[tex]x=\frac{3}{a }[/tex]
The second one is
[tex]x=- \frac{a }{6 }[/tex]
The third is
[tex]x=-\frac{6}{a}[/tex]
Hope this helps, it's just simple rearrangement for x!