Объяснение:
7(4 – а) – 3(-3а + 1) – 25 = 28 – 7а + 9а – 3 – 25 = 2а.
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Объяснение:
7(4 – а) – 3(-3а + 1) – 25 = 28 – 7а + 9а – 3 – 25 = 2а.