Раскройте скобки и упростите выражение
1) 5,6а-(1,7а-(3-8,9а))
2) 1,3b-(6,5b-(4,8b+9))
1) 5,6а-(1,7а-(3-8,9а))
2) 1,3b-(6,5b-(4,8b+9))
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Answers & Comments
2. 1,3b-6,5b+4,8b+9=-0,4b+9
1) 5,6а-1,7а+3-8,9а= 3-5а
2) 1,3b-6,5b+4,8b+9= 0,4+9