1.3. Раскройте скобки и приведите подобные слагаемые в выражении: -(4.3a + 2.1b) + (0.4b - 3.3a) - (1.7b -5.9a)
A) 1.7a 3.4b
B) -1,7а 3,4b
С) -1.7a 3.4b
D) 1,7а -3.4b
E) - 17а 3.4b
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