\(\left(\frac{1}{4}x-1\right)+\left(\frac{5}{6}x-2\right)-\left(\frac{3}{8}x+1\right)=4,5\)
\(\frac{1}{4}x-1+\frac{5}{6}x-2-\frac{3}{8}x-1=\frac{9}{2}\)
\(\left(\frac{1}{4}x+\frac{5}{6}x-\frac{3}{8}x\right)=\frac{9}{2}+1+2+1\)
\(\frac{17}{24}x=\frac{17}{2}\)
\(x=\frac{17}{2}:\frac{17}{24}\)
\(x=\frac{17}{2}.\frac{24}{17}\)
\(x=\frac{24}{2}\)
\(x=12\)
vậy \(x=12\)