Răspuns :
[tex]x \sqrt{16} = \sqrt{4} + 2 \sqrt{36} \\ \\ x \times 4 = \sqrt{4} + 2 \sqrt{36} \\ \\ x \times 4 = 2 + 2 \sqrt{36} \\ \\ x \times 4 = 2 + 2 \times 6 \\ \\ 4x = 2 + 2 \times 6 \\ \\ 4x = 2 + 12 = 14 \\ \\ x = \frac{14}{4} = 3,5 [/tex]