pls help

Select one of the two 3x3 systems of equations and work out the solution using the rules for row reduction. You may get the answers by using either of the following: a.Reduce it to Row Echelon form, then use back substitution to get the values of xy and w. b.Reduce it to Reduced Row Echelon form (also called Gauss-Jordan) to find the values of x, y and w. You must show all intermediate equivalent matrices and use the Row reduction notation so I can follow your steps. For example: To multiply row 2 by-3, add to row 3 and put the answer in row 3 you would write -3R2 + R3 R3 Take a picture of your work and attach it using the Paperclip. NO WORK, NO POINTS EX 1: x +2y - 3w=9 3x-y-W=-10 2x + 5y + 4w=13