$\frac{7}{11} \times \frac{x}{21} = 1$ . Find $x$ .

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Solution

$\frac{7}{11} \times \frac{x}{21} = 1$

So, $\frac{7 x}{231} = 1$

$7 x = 1 \times 231$

$7 x = 231$

$x = \frac{231}{7}$

$S o, x = 33$

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