[tex]20\frac{1}{9}-(x-4\frac{17}{19})=7\frac{18}{19}[/tex]
[tex]\frac{181}{9}-(x-\frac{93}{19})=\frac{151}{19}[/tex]
[tex]\frac{181}{9}-x+\frac{93}{19}=\frac{151}{19}[/tex]
[tex]x=\frac{181}{9}+\frac{93}{19}-\frac{151}{19}[/tex]
[tex]x=\frac{3439+837-1359}{171}[/tex]
[tex]x=\frac{2917}{171}=17\frac{10}{171}[/tex]