Odpowiedź :
[tex]\sqrt5x-3=7\\\\\sqrt5x=7+3\\\\\sqrt5x=10\ \ \ |:\sqrt5\\\\x=\frac{10}{\sqrt5}\\\\x=\frac{10}{\sqrt5}\cdot\frac{\sqrt5}{\sqrt5}\\\\x=\frac{10\sqrt5}{5}\\\\x=2\sqrt5[/tex]
a) 2√5
[tex]\sqrt5x-3=7\\\\\sqrt5x=7+3\\\\\sqrt5x=10\ \ \ |:\sqrt5\\\\x=\frac{10}{\sqrt5}\\\\x=\frac{10}{\sqrt5}\cdot\frac{\sqrt5}{\sqrt5}\\\\x=\frac{10\sqrt5}{5}\\\\x=2\sqrt5[/tex]
a) 2√5