4 2a 9 )= 5 3a 7 )- 1 July 8, 2019 16 32 64 128 3 5-9a=2(0 5а-4) 9а - 4(а + 5) - 1 = 7(а + 3) - 2а 3 5-9a=2(0 5a-4)
