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182075
11.01.2020 •
Mathematics
Brianna went to los angeles for a vacation. she spent 5 nights at a hotel and rented a car for 6 days. justin stayed at the same hotel, but spent 7 nights and rented a car for 8 days from the same company. if brianna paid $1170 and justin paid $1610, how much did one night at the hotel cost?
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Ответ:
$150 per night
Use a system of equations using x (cost of hotel) and y (cost of car):
5x + 6y = 1170
7x + 8y = 1610
Solve for y in one of the equations and then use substitution to solve for x in the other:
6y = 1170 - 5x
y = (-5/6)x + 195
7x + 8((-5/6)x + 195) = 1610
7x + (-20/3)x + 1560 = 1610
(1/3)x +1560 = 1610
(1/3)x = 50
x = $150 a night
Ответ: