\(\sqrt{12}\) -\(\sqrt{147}\) + y\(\sqrt{3}\) = 0 \(\sqrt{4\times 3}\) - \(\sqrt{49\times 3}\) + y\(\sqrt{3}\) = 0 2\(\sqrt{3}\) - 7\(\sqrt{3}\) + y\(\sqrt{3}\) = 0 y\(\sqrt{3}\) = 7\(\sqrt{3}\) - 2\(\sqrt{3}\) y = \(\frac{5\sqrt{3}}{\sqrt{3}}\) y = 5