3,1x - 0,3x + 2,2x - 4x =


B) 4,5a - 0,04a + 3,07a - 7,53a =


C) - (3,3a + 1,2b) - (0,7b + 1,7a) - (1,1b - 5a) =


D) (4,7a + 2,2c) • ( - 2) - (9,6a - 4,4c) =


E) 7,2 • (x + c) - ( 1,1x - 3,6c) • ( - 2) =

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