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28-09-2020
Mathematics

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3 ( Q - 7 ) = 21
Q = ?

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Аноним Аноним

28-09-2020

Answer:

Step-by-step explanation:

use distributive prop.

3 times q =3Q

3 Times -7 =-21

3Q-21=21

ADD 21 to both sides

3q=42

q=14 .

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