To determine how many solutions exist for the equation $2x + 1 = 5$, let's solve it step by step:

1. Start with the given equation: $2x + 1 = 5$

2. Subtract 1 from both sides to isolate the $2x$ term: $2x = 5 - 1$ $2x = 4$

3. Divide both sides by 2 to solve for $x$: $x = \frac{4}{2} = 2$

Thus, there is 1 solution for this equation: $x = 2$.

The correct answer is:

• B. 1

Would you like further details or have any questions?

Here are 5 related questions:

1. How do you solve linear equations with variables on both sides?
2. What is the graphical interpretation of solving $2x + 1 = 5$?
3. How can you check your solution to a linear equation?
4. What is the difference between a unique solution and no solution in a linear equation?
5. Can an equation have more than one solution? If so, under what conditions?

Tip: Always isolate the variable step by step to avoid mistakes when solving equations.