Answer:
What is the question?
Step-by-step explanation:
5 C + 3 < 28 a - 4 C - 214
a>9c +31
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28. 4
C >28a-21
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9
Answer:
5n
Step-by-step explanation:
(7^5 * 7^n) ^ 4 = (7^11/7^n)^3
7^(20 + 4n) = 4.7^15 / n^3
= 20/4 = 5n and 15/3 = 5n
Answer 5n