The final expression would be -5x -50.
You could've got this by multiplying -5 and x together, which is -5x.
Multiply -5 and 10 together, and you get -50.
This is also called the Distributive Property. Hope this helped :)
First we have to divede the tota of students into the sice of each grop so:

So we can aproximate this to a whole number so:
X=-4 it’s already simplified