Помогите пожалуйста!!!!!!!! Упростите выражение: а) b - (4 - 3b) + (2b -1); б) у - (у + 5) + (у - 5); в) 4х - (1 - 3х) + (3х - 7); г) (у - 1) + (12 - 7,5у); д) (4m + 2,9) - (8 - р); е) (4 -0,5а) - (10 - 0,4а).​
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