cdxxc9324
04.09.2020 •
Mathematics
Celeste went shopping at Barnes and Noble over the weekend. She bought 3 CD’s at x dollars, 2 DVD’s at $10 each, and a book that cost $15. Write an expression that shows how much Celeste spent during her trip to Barnes and Noble.
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Ответ:
400 miles
Step-by-step explanation:
x - miles driven
140 + 0.70x - a day cost of renting from A
60 + 0.90x - a day cost of renting from B
140 + 0.7x = 60 + 0.9x
- 60 - 60
80 + 0.7x = 0.9x
-0.7x -0.7x
80 = 0.2x
×5 ×5
400 = x