14 + х = -6 у + 7 = -13 х + 11 = -4
х=-6-14 у= -13-7 х = -4-11
х= -20 у= -20 х= -15
14 - 20 = -6 -20 + 7 = -13 -15 + 11 = -4
14 + х = -6 у + 7 = -13 х + 11 = -4
х=-6-14 у= -13-7 х = -4-11
х= -20 у= -20 х= -15
14 - 20 = -6 -20 + 7 = -13 -15 + 11 = -4