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The image contains a mathematical word problem in Indonesian involving the prices of books, pencils, and pens. Here's a transcription and explanation of the problem:

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The problem describes three scenarios with different combinations of books, pencils, and pens purchased at a store. The objective is to determine the individual prices of each item using a system of equations, most likely by applying matrix methods.

### Problem Transcription (in Indonesian):
1. **Harga 3 buku tulis, 2 pensil, dan 3 bolpoin di toko Sahabat Pena adalah Rp37.000,00.**
   - Translation: The price of 3 notebooks, 2 pencils, and 3 pens at the store "Sahabat Pena" is Rp37,000.

2. **Harga 2 buku tulis dan 3 pensil adalah Rp20.500,00.**
   - Translation: The price of 2 notebooks and 3 pencils is Rp20,500.

3. **Harga 4 pensil dan 3 bolpoin adalah Rp18.300,00.**
   - Translation: The price of 4 pencils and 3 pens is Rp18,300.

4. **Tina membeli 2 buku, 1 pensil, dan 1 bolpoin tentukan harga masing-masing alat tulis yang harus dibayar menggunakan konsep matriks.**
   - Translation: Tina buys 2 notebooks, 1 pencil, and 1 pen. Determine the price of each stationery item using the concept of matrices.

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### Setting up the System of Equations:
Let:
- \( x \) = price of one notebook (buku)
- \( y \) = price of one pencil (pensil)
- \( z \) = price of one pen (bolpoin)

From the given information, we can form the following system of linear equations:

1. \( 3x + 2y + 3z = 37,000 \)
2. \( 2x + 3y = 20,500 \)
3. \( 4y + 3z = 18,300 \)

Using these equations, we can solve for the individual prices of notebooks, pencils, and pens.

Would you like me to solve this system step by step using matrices or substitution?

Harga 3 buku tulis, 2 pensil, dan 3 bolpoin di toko Sahabat Pena adalah Rp37.000,00. Harga 2 buku tulis dan 3 pensil adalah Rp20.500,00. Harga 4 pensil dan 3 bolpoin adalah Rp18.300,00. Tina membeli 2 buku, 1 pensil, dan 1 bolpoin tentukan harga masing-masing alat tulis yang harus dibayar menggunakan konsep matriks.

Solve a real-world problem using matrix algebra. Find the individual prices of notebooks, pencils, and pens from a system of linear equations. Perfect for students in Grades 9-11 studying linear equations and matrix methods.

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