1) -2\5(15a+1\2b)+1\5b=? 2) 4 2\5(3\11-a)-1 1\5=?
3) -1\9(3b-9)+1\3b=?
4) -2 3\8(4c+8\19)+9 1\2=?
ЕСЛИ РЕШИТЕ 25 БАЛОВ
ПОЖАЛУЙСТА РЕШИТЕ!!!!
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