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26-05-2019
Mathematics

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I need help please.

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Аноним Аноним

26-05-2019

Answer:

63x-63

Step-by-step explanation:

Distributive property says: a(p+q)=ap+aq

In this case, a=7,while p=9x and q=-9

Therefore, this is 7*9x+7*-9

This equals 63x-63

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