November 2021 1 7 Report
Помогите решить и объясните .
9(2+m)
-3(1.5+n)
2,8(3-m)
-2,5a+1,8a+1,5a
3,2b-4,3b-3,2b
1,9d-4,2d+3,1d
7,2a-5a-1,3a
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