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Sagot :
Answer:
- The price of 9 books is $20 more than the price of 4 books. What is the price of a book?
Step-by-step explanation:
Target equation is
- 4x + 20 = 9x
Comparing this with situations below
The price of 9 books is $20 more than the price of 4 books. What is the price of a book?
- 9x = 20 + 4x, correct
The price of 4 books is $20 more than the price of 9 books. What is the price of a book?
- 4x = 9x + 20, incorrect
The price of 9 books equals $24. What is the price of a book?
- 9x = 24, incorrect
Joyce bought x number of $4 books and $9 books. She spent $20. How many books of each price did she buy?
- 4x + 9x = 20, incorrect
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