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agasfer [191]
2 years ago
14

Pls please help me ASAP!!!

Mathematics
1 answer:
oksian1 [2.3K]2 years ago
8 0

Answer:

z = 0

Step-by-step explanation:

3 (z + 7) = 21

3z + 21 = 21

3z = 0

z = 0

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