SOLUTION
Write out the given information
[tex]\begin{gathered} \text{current weight=64 115 pounds } \\ \text{Legal weight =80 000 pounds } \end{gathered}[/tex]The amount of weight to put into the trailer will be given by
[tex]\text{Legal weight-current weight }[/tex]Then
[tex]80\text{ 000-64 115=}15\text{ 885}[/tex]Therefore
The amount of weight will be 15 885 pounds