# Determine which matrices are blackuced echelon form and which others are only in echelon form. x1 __+x3 = 1; x2+x3=1; 0+0+0=0

Determine which matrices are blackuced echelon form and which others are only in echelon form.
x1 __+x3 = 1; x2+x3=1; 0+0+0=0
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Damarion Pierce
x1 __+x3 = 1; x2+x3=1; 0+0+0=0

the matrices are blackuced echelon form

A matrix is in blackuced row-echelon form if it meets all of the following conditions:

1. If there is a row where every entry is zero, then this row lies below any other row that contains a nonzero entry.
2. The leftmost nonzero entry of a row is equal to 1.
3. The leftmost nonzero entry of a row is the only nonzero entry in its column.
4. Consider any two different leftmost nonzero entries, one located in row i, column j and the other located in row s, column t. If si, then tj.