Respuesta :

0.7n+0.8n=2.1

1.5n=2.1

n=1.4

Therefore, the answer is B.

Wedddwddd

Answer:

B). n = 1.40

Step-by-step explanation:

0.7n + 0.8n = 2.1

(0.7n + 0.8n) = 2.1

1.5n = 2.1

/1.5 /1.5

n = 1.40

hope this helped!

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