Respuesta :

mathstudent55

Answer:

26 2/3 nights

Step-by-step explanation:

You can use a proportion.

21 pages is to 4 nights as 140 pages is to x nights

21/4 = 140/x

21x = 4 * 140

3x = 4 * 20

3x = 80

x = 80/3 = 26 2/3

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