Question

помогите срочно
-(1.9a+8.1b)+(0.5b-7.1a-(1.4b+3.9a)
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Answer 1

Ответ:

$-(1.9a+8.1b)+(0.5b-7.1a)-(1.4b+3.9a) =-1.9a-8.1b+0.5b-7.1a-(1.4b+3.9a)=-9a-7.6b-(1.4b+3.9a)=-9a-7.6b-1.4b-3.9a=-9a-9b-3.9a=-12.9a-9b$

Пошаговое объяснение: