Resposta: # x = -8 / 3 # # y = 17/6 # Explicació: # 5x + 4y = -2 # # x-4y = -14 # Afegint la primera equació a la segona equació obtenim # 5x + 4y + x-4y = -2-14 # # x-4y = -14 # # 6x = -16 # # x-4y = -14 # # x = -16 / 6 # # x-4y = -14 # # x = -8 / 3 # # -8 / 3-4y = -14 # # x = -8 / 3 # # 4y = -8 / 3 + 42/3 # # x = -8 / 3 # # 4y = 34/3 # # x = -8 / 3 # # y = 34/12 # # x = -8 / 3 # # y = 17/6 #
