Răspuns:
[tex]x = 3 \sqrt{5} [/tex]
[tex] \sqrt{10} x - 13 \sqrt{2} = 2 \sqrt{2} [/tex]
[tex] \sqrt{10} x = 2 \sqrt{2} + 13 \sqrt{2} [/tex]
[tex] \sqrt{10} x = 15 \sqrt{2} [/tex]
[tex]x = \frac{15}{ \sqrt{5} } [/tex]
