2а–(3а–(4а–5))
2а–3а+4а–5
3а–5
Ответ:
2а–(3а–(4а–5))=2а–(3а–4а+5)=2а–3а+4а-5=2a+a-5=3a-5
Объяснение:
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2а–(3а–(4а–5))
2а–3а+4а–5
3а–5
Ответ:
2а–(3а–(4а–5))=2а–(3а–4а+5)=2а–3а+4а-5=2a+a-5=3a-5
Объяснение: