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A truck can be rented from Company A for ​$90 a day plus ​$0.40 per mile. Company B charges ​$50 a day plus ​$0.80 per mile to rent the same truck. Find the number of miles in a day at which the rental costs for Company A and Company B are the same.

Respuesta :

Answer:

100 miles

Step-by-step explanation:

50 + 0.80n = 90 + 0.40n                             N = number of miles

50 - 50 + 0.80n = 90 - 50 + 0.40n

0.80n = 40 + 0.40n  

0.80n - 0.40n = 40 + 0.40n - 0.40n

0.40n = 40

0.40n/0.40 = 40/0.40

N =  100

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