i am stuck on a question and i need help solving it so, this is my question what is 9n-12=3n if someone could help me i would appreciate it.

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

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.