X - 6y + 2z = 5
2x - 3y + z = 4
3x + 4y - z = -2

Ifigured out the question and i dont know what to put here

Let r = 3. what is the value of r + 58?

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.