The base fee of truck rent is $19.99.
The additional charge for each mile driven is , 74 cents.
The total amount to pay by him is, $159.85.
To determine the miles he drive the truck which is denoted as x,
[tex]159.85=19.99+x(74)[/tex][tex]139.86=\text{ 74x}[/tex][tex]x=1.89[/tex]Therefore, the number of miles he drive the truck is, 1.89 miles.