Which of the following is an equation?

Options

A. `n-11`
B. `n + 1 gt 0`
C. `n +1 =0`
D. `11-n`

Answer

To determine which of the given options is an equation, we need to understand what an equation is. An equation is a mathematical statement that asserts the equality of two expressions, and it must contain an equal sign (=).

Let's analyze each option step by step:

1. **Option 1: n - 11**
- This is an expression, not an equation, because it does not have an equal sign.

2. **Option 2: 2n + 1 > 0**
- This is an inequality, not an equation, because it uses the greater than sign (>) instead of an equal sign.

3. **Option 3: n + 1 = 0**
- This is an equation because it contains an equal sign that connects two expressions (n + 1 and 0).

4. **Option 4: 11 - n**
- This is also an expression, not an equation, because it does not have an equal sign.

From our analysis, we can conclude that:

**The correct answer is Option 3: n + 1 = 0, which is an equation.**