604 | Business Statistics 10. If 2A + B = 12 -3 [13 22] and 3A - 4B 7 [2, 10]. 21 11 604 | Business Statistics 10. If 2A + B = 12 -3 [ 13 22 ] and 3A - 4B 7 [ 2 , 10 ] . 21 11​