To solve x:
1. Substract 19 in both sides of the equation:
[tex]\begin{gathered} 73-19=(\frac{9}{10}x)+19-19 \\ \\ 54=\frac{9}{10}x \end{gathered}[/tex]2. Multiply both sides of the ewuation by 10/9:
[tex]\begin{gathered} 54\cdot\frac{10}{9}=\frac{9}{10}x\cdot\frac{10}{9} \\ \\ \frac{540}{9}=x \\ \\ 60=x \end{gathered}[/tex]