2х+1

The expression 2x + 1 is a linear equation. It represents a straight line on a graph. To solve this equation, you need to isolate x on one side of the equation.

Here's how you can solve it:

1. Start with the equation: 2x + 1 = 0

2. Subtract 1 from both sides of the equation: 2x = -1

3. Divide both sides of the equation by 2: x = -1/2.

So the solution to the equation 2x + 1 = 0 is x = -1/2.