hdn12

30.06.2020 12:53 •  Математика

Д) –6 ∙ (8a – 2b) + (3a – 7b) ∙ (–0,2); ж) 4 ∙ (8t + 7) – 16 ∙ (2t – 3); б) ∙ (12 – 21y) + 3y ;

г) –7 ∙ (3 – 4c) + 14 ∙ (5 + 2c);

e) 3 ∙ (21x – y) – 28 ∙ (2x – 3y);

з) 7 ∙ (4x – 3) + (8 – 5x).
большое!