40баллов)))))Раскройте скобки и приведите подобные слагаемые!
1)3,3a+(a-4);
2)5a-(0,7+8)
3)5,3b-(2b+3)
4)9,6b+(7-0,4b)
5)2c-(9-5,1c)
6)-5c+(13-6c)
СРОЧНО))
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