Jawapan: #color (ungu) (x = 3, y = 2 # Penjelasan: # x + 2y = 7, "Eqn (1)" # # x - 2y = -1, "Eqn (2)" # Menambah Persada (1), (2), #x + cancel (2y) + x -cancel (2y) = 7 - 1 # # 2x = 6 "atau 'x = 6/2 = 3 # Menggantikan nilai x dalam Persamaan (1), # 3 + 2y = 7 # # 2y = 7 - 3 = 4 # #y = 4/2 "atau" y = 2 #
