[tex] \sqrt{10x} - \sqrt{4} = 6 \\ \sqrt{10x} = 6 + 4 \\ \sqrt{10x} = 10 \\ 10x = 100 \\ x = 10 \\ \sqrt{10 \times 10} - 4 = 6 \\ 6 = 6 \\ \bf \: x = 10[/tex]

Пошаговое объяснение:

[tex] \sqrt{10x} - \sqrt{4} = 6 \\ \sqrt{10x} - \sqrt{4} - ( - \sqrt{4} ) = 6 - ( - \sqrt{4} ) \\ \sqrt{10x} = 6 - ( - \sqrt{4} ) \\ \sqrt{10x} = 8 \\ 10x = 64 \\ \frac{10x}{10} = \frac{64}{10} \\ x = \frac{64}{10} \\ x = \frac{32}{5 } = 6 \frac{2}{5} = 6.4[/tex]