September 2021 0 15 Report
Раскройте скобки и упростить выражение 1) 3 (а-б)-2 (а+б)=
2) 4 (х+у)+5 (2х-у)=
3) 2,4 (с-3д)-1,3 (2с-д)=
4) -3/4 (1/3m+n)-1/4 (3m+n)=
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