Ответ:
(3,3a + 3,2b) + (1,7b –2.3a) – (2,1b – 5,3a)=а+4,9b-(2,1b-5,3а)
а+4,9b-2,1b+5,3a=6,3a+2,8b
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Ответ:
(3,3a + 3,2b) + (1,7b –2.3a) – (2,1b – 5,3a)=а+4,9b-(2,1b-5,3а)
а+4,9b-2,1b+5,3a=6,3a+2,8b