2 ∙ (8a 7) – 5a July 8, 2019 16 32 64 128 8a 7 5a 2 40 8a 7 (- 2 5a 2 ∙ (8a + 7) – 5a 2 8•5a 7 8а+2 3а-5а мұндағы а=6 2 8•5а
