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The image contains a page with math exercises in Japanese, which primarily involve algebraic equations and word problems. Here's an outline of the questions:

### Section 1: Solve for \( x \)
1. Questions involve finding values of \( x \) in linear equations such as \( 2x - 5 = 3x + 2 \) and similar types.

### Section 2: Word Problems involving Cost and Quantity
1. The first problem involves the purchase of items with given prices, and finding quantities or total costs.
2. Similar problems ask for solving equations based on given relationships between quantities and their costs.

### Section 3: Substitution Problems
1. Problems where variables need to be substituted into equations to find values for items like chocolates and cookies.

### Section 4: Past Questions on Word Problems
1. Problems ask for quantities in scenarios where objects are divided among groups or calculated based on given conditions.
  
### Section 5: Discount Calculation Problems
1. Problems involve calculating original prices or discounts.

Would you like a detailed solution for any specific problem on this page? 

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Here are five related questions to expand on these topics:
1. Can you solve equations involving both positive and negative terms for \( x \)?
2. How would you set up a word problem involving item costs if multiple unknowns are given?
3. What are common methods for solving substitution problems?
4. How can proportional reasoning help in dividing items among groups in word problems?
5. What are the steps for calculating discounts or original prices given the final price?

**Tip:** When approaching word problems, always define the unknowns clearly and translate the words into equations step-by-step.

Math exercises involving solving equations, word problems, substitution problems, and discount calculations as shown on the page.

This page contains a variety of math exercises for Grades 7-9, including algebraic equations, word problems, and discount calculations. Topics covered include linear equations, substitution, and proportional reasoning in cost-related problems.

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