Solve for x: 2(x + 5) = 18.

To solve the equation 2(x + 5) = 18, we follow these steps:

1. First, distribute the 2 on the left side of the equation. This gives us:

2 * x + 2 * 5, which simplifies to:

2x + 10 = 18.

2. Next, we want to isolate the term with x. To do this, we can subtract 10 from both sides:

2x + 10 - 10 = 18 - 10, which simplifies to:

2x = 8.

3. Now we need to solve for x. We do this by dividing both sides by 2:

2x / 2 = 8 / 2, which gives us:

x = 4.

Thus, the solution to the equation is x = 4. This means that when substituted back into the original equation, the left side equals the right side, confirming that the value is correct.