A matrix could have two  row echelon forms with different pivot positions.  true or false

Construct the augmented matrix that corresponds to the following system of equations.5+8x/5=y8z−3(x−4y)=06x−y=3(x−6z)

Reduce the matrix -1 2 -2 2 A = 3 0 3 -1 3 21 to reduced row-echelon form.

Each augmented matrix below is already in ref form (row-reduced-echelon-form). For each, state the number of solution(s), and give solution(s) in the form (x, y), or (x, y, z), etc. If there are infinite solutions, give the general form (pattern) for the solutions.