Объяснение:
-8(2,5a-1,5)+5,5a-6=-20a+12+5,5a-6=-20×(-2)+12-5,5×(-2)-6=40+12+11-6=57
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Объяснение:
-8(2,5a-1,5)+5,5a-6=-20a+12+5,5a-6=-20×(-2)+12-5,5×(-2)-6=40+12+11-6=57