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MrRissso [65]
4 years ago
8

Please help me I don’t understand I will mark as brainliest!!! Stay safe :)

Mathematics
1 answer:
svetlana [45]4 years ago
6 0

Answer:

A) \frac{n+54}{9} =21

n+54=21*9

n+54=189

n=189-54

B) n=135

C) Equation and Solution:

n+28=156\\n=156-28\\n=128

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answer:

attached below

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