Mariya was asked to solve a/-13< =-16 and then graph the solution. her work is shown below.

I think there is something that tells us how full the crates are, otherwise there's no way to solve this problem.
Let's assume that 5x oranges can fit into each crate, and that we have a crate with x oranges, a crate with 2x oranges, and a crate with 4x oranges. We get this:
x/5x+2x/5x+4x/5x
Add those together and we get
7x/5x
Turn it into a mixed number:
1 2x/5x
And we get our answer