Angie was given the system of equations. Angie's work is shown in the table. 7x +y = - 12 7x + 4y = -6 Steps 1 Angie's Work --1 (77 + y = -12) -70 -76 = y = 12 72 + 4y = -6 Y = 12 2 3y = 6 Y = 2 -7 (2) - y = 12 -14 - y = 12 3 -Y = 26 Y = -26 4 The solution is (-2,2) Where did Angie make an error? Justify your answer.​