03. Упростите выражение:
а) (х - 1) + (12 - 7,5х);
б) (2p + 1,9) - (7 - p);
в) (3 - 0,4а) - (10 - 0,8а);
г) b - (4 - 2b) + (3b - 1);
д) y - (у + 4) + (у - 4);
е) 4x - (1 - 2x) + (2х - 7).​
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