When solving equations, we reduce the matrix to echelon form. It is in echelon form when the first nonzero element, if any, in each row is to the right of the first nonzero element of the previous row
These first nonzero elements will be called ``pivots.''Example echelon form
Example nonechelon form
Another nonechelon form
You must reduce your systems completely to echelon form. You may not delete any rows as the book says.