Jawab:B. x = 15/7y = 24/7D. x = 17/13y = -7/26Penjelasan dengan langkah-langkah:B. x + 2y = 9 (x1) x + 2y = 93x - y = 3 (x2) 6x - 2y = 6 _________ + 7x = 15 x = 15/7x + 2y = 9 (x3) 3x + 6y = 273x - y = 3 (x1) 3x - y = 3 _________ - 7y = 24 y = 24/7D.5x + 2y= 6 (x3) 15x + 6y = 183x - 4y = 5 (x5) 15x - 20y = 25 _________ - 26y = -7 y = -7/265x + 2y= 6 (x2) 10x + 4y = 123x - 4y = 5 (x1) 3x - 4y = 5 _________ + 13x = 17 x = 17/13