The following two system of equations are equivalent ⎩ ⎨ ⎧ ​ 2x−2y x−y −3x+4y+2z ​ =−4 =−2 =9 ​ ⎩ ⎨ ⎧ ​ 0=0 −x−y−4z=−4 x+2y+6z=7 ​ ​ True False 2. The general solution to the following system has 1 parameter: −2y+6z−4w x−4z−2w 2y+5z−4w ​ =−4 =−2 =−4 ​ True False 3. Given a 3×4 augmented matrix, R 2 ​ ←3R 1 ​ +R 3 ​ is an elementary row operation. True False