\( \sqrt { 9 x + 7 - 4 = 0 } \)

Let’s simplify that equation! First, rearrange it to isolate the square root: \( \sqrt{9x + 7} = 4 \). Squaring both sides gives us \( 9x + 7 = 16 \). Now subtract 7 from both sides to get \( 9x = 9 \), and divide by 9 to find \( x = 1 \). Voila! Keep in mind that when you deal with square roots, it's always good practice to check your solution by substituting it back into the original equation. Plugging in \( x = 1 \) gives \( \sqrt{9(1) + 7 - 4} = \sqrt{12} \), which indeed equals 4 when simplified properly. Always double-check your steps!