10. Решите уравнение:
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а) $$ 6\sqrt{x} = 5 $$
$$ \sqrt{x} = \frac{5}{6} $$
$$ x = (\frac{5}{6})^2 = \frac{25}{36} $$
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б) $$ \sqrt{7x} = 1 $$
$$ 7x = 1 $$
$$ x = \frac{1}{7} $$
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в) $$ \frac{1}{\sqrt{x}} = 3 $$
$$ \sqrt{x} = \frac{1}{3} $$
$$ x = (\frac{1}{3})^2 = \frac{1}{9} $$
Ответ: 1) $$\frac{25}{36}$$; 2) $$\frac{1}{7}$$; 3) $$\frac{1}{9}$$