September 2021 0 12 Report
Помогите!!! Заранее спасибо..30 баллов. 9. Упростите выражение: 5а – (6а – (7а – (8а – 9)))
а) 9 – 2а; б) 9 – 21а; в) –9 – 2а; г) свой ответ

10. Решите уравнение: 5 • (4 – 3х) – 4 • (7 – 4х) = 1,3
а) 0,3; б) 9,3; в) –6,7; г) свой ответ
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