August 2021 1 21 Report
Упростите:
а)(-0.7x+0.6y)5-3(0.4y-1.5x)
б) 2/9(1.8-1,1/2a)-1,1/6(1,2-2/7a)

Дроби типа 2/9 и т.п. являются простыми.
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