alex7881
07.06.2021 •
Mathematics
Which expression is equal to 
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Ответ:
7 + 28d
Step-by-step explanation:
-7(-1 - 4d) [ -7 gets multiplied with -1 and-4d when brackets open ]
= -7 × (-1) -7 × (-4d)
= 7 + 28d (Ans)