Mai solved the equation below incorrectly. Identify Mai's error and then solve the equation correctly. LaTeX: \frac{1}{3}\left(\frac{1}{2}x-9\rig ht)=\frac{1}{2}\left(x+18\right)1 3 ( 1 2 x − 9 ) = 1 2 ( x + 18 )

LaTeX: \frac{1}{6}x-3=\frac{1}{2}x+91 6 x − 3 = 1 2 x + 9

LaTeX: \frac{1}{4}x-3=91 4 x − 3 = 9

LaTeX: \frac{1}{4}x=121 4 x = 12

LaTeX: x=48