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Murrr4er [49]
3 years ago
14

3.5(10n + 2n - 9) = 178.5

Mathematics
1 answer:
Elena-2011 [213]3 years ago
8 0

Answer:

n= 5

Step-by-step explanation:

3.5 (10n + 2n-9) = 178.5

Divide 3.5 on both sides

10n + 2n -9 +51

Add like terms to get 12n

12n - 9 = 51

12n = 51 + 9

Add 51 and 9 to get 60

12n + 60

Divide 60 by 12 to get 5

n=5

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