After simplifying, which expressions are equivalent? Select three options. (3.4a – 1.7b) + (2.5a – 3.9b) (2.5a + 1.6b) + (3.4a + 4b) (–3.9b + a) + (–1.7b + 4.9a) –0.4b + (6b – 5.9a) 5.9a – 5.6b

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