Caranya no 6 gimana ya ? Makasih

[tex] \sqrt{3x + 12} - 4 = 2 \\ \sqrt{3x + 12} = 2 + 4 \\ \sqrt{3x + 12} = 6 \\ \\ 6 = \sqrt{36 } \\ \\ 36 = 3x + 12 \\ 36 - 12 = 3x \\ 24 = 3x \\ \frac{24}{3} = x \\ 8 = x[/tex]