[tex]\displaystyle \\
\frac{x-1}{2} + \frac{x-1}{3} + \frac{x-4}{4}=1 \\ \\
\frac{6(x-1)}{12} + \frac{4(x-1)}{12} + \frac{3(x-4)}{12}=1\\ \\
\frac{6(x-1) +4(x-1)+3(x-4)}{12} =1\\ \\
\frac{10(x-1) +3(x-4)}{12} =1\\ \\
\frac{10x-10 +3x-12}{12} =1\\ \\
\frac{13x-22}{12} =1[/tex]
[tex]\displaystyle
13x-22 = 12 \\
13x = 12+22 \\
13x = 34 \\ \\
x = \boxed{ \frac{34}{13} } [/tex]