An open sentence containing the sign is equal to is called an equation

Answer

To solve the question, we need to analyze the statement: "An open sentence containing the sign is equal to is called an equation."

### Step-by-Step Solution:

1. **Understand the Terms:**
- An **open sentence** is a mathematical statement that contains one or more variables and can be either true or false depending on the values of those variables.
- An **equation** is a mathematical statement that asserts the equality of two expressions and contains an equal sign (=).

2. **Analyze the Statement:**
- The statement claims that if an open sentence contains an equal sign, then it qualifies as an equation.

3. **Apply the Definitions:**
- Since an open sentence can be true or false based on the values substituted for its variables, if it includes an equal sign, it meets the definition of an equation.

4. **Conclusion:**
- Therefore, the statement "An open sentence containing the sign is equal to is called an equation" is true because it aligns with the definition of what constitutes an equation.

### Final Answer:
The statement is **True**.

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