How do you solve this 4x - 2x -20x + x

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Anyone know? will mark brainliest if you're correct!

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2