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The question asks for the expression that represents "the difference of seven and three times a number." 

To solve this, let's break down the phrase:

1. "Three times a number" can be written as \( 3x \), where \( x \) represents the unknown number.
2. "The difference of seven and three times a number" means we subtract \( 3x \) from 7, which gives us the expression \( 7 - 3x \).

So the correct answer is the first option: \( 7 - 3x \).

Would you like further details or have any questions?

Here are 5 related questions you might consider:
1. What is the expression for "the sum of seven and three times a number"?
2. How would you write the expression for "seven less than three times a number"?
3. What is the difference between the expressions \( 3x - 7 \) and \( 7 - 3x \)?
4. How do you represent "three times the difference of a number and seven"?
5. Can you write an equation where the difference of seven and three times a number equals zero?

**Tip:** When translating word problems into algebraic expressions, focus on key words like "sum," "difference," "product," and "quotient" to determine the correct operation.

The difference of seven and three times a number.

Learn how to express the difference of seven and three times a number as an algebraic expression. This problem covers key algebraic concepts suitable for Grades 6-8, focusing on basic algebraic operations like subtraction and multiplication.

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