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15-04-2021
Mathematics

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

Respuesta :

larabar357 larabar357

15-04-2021

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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