(1/3) в степени 4х-9=1/27

[tex]( \frac{1}{3} ) ^{4x-9} = \frac{1}{27} \\ \\ ( \frac{1}{3} ) ^{4x-9} = (\frac{1}{3} ) ^{3} \\4x-9=3\\4x=3+9\\4x=12\\x=12/4\\x=3[/tex]