Ответ:
[tex] \frac{x}{81} = \frac{2}{27} \\ \frac{27x}{81} = 2 \\ 27x = 2 \times 81 \\ 27x = 162 [/tex]
|:27
x=6
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Ответ:
[tex] \frac{x}{81} = \frac{2}{27} \\ \frac{27x}{81} = 2 \\ 27x = 2 \times 81 \\ 27x = 162 [/tex]
|:27
x=6