It seems like there is a typo in your expression. Did you mean to write "2x + x + 18" or "2x + x + l8 (lowercase l instead of number 1)"?

Assuming you meant "2x + x + 18", here's the simplification:

1. Combine like terms:
\[
2x + x = 3x
\]
So the expression becomes:
\[
3x + 18
\]

This is the simplified form of the given expression.

Would you like more details or have any questions?

Here are 5 related questions:
1. What is the solution if \( 3x + 18 = 0 \)?
2. How would you factor the expression \( 3x + 18 \)?
3. Can you solve for \( x \) in the equation \( 3x + 18 = 24 \)?
4. What happens if you subtract a number from both sides of an equation involving \( 3x + 18 \)?
5. How would you graph the equation \( y = 3x + 18 \)?

**Tip**: When simplifying algebraic expressions, always combine like terms first for easier handling!

Learn how to simplify the algebraic expression 2x + x + 18 by combining like terms. This problem focuses on basic algebraic techniques such as term combination and the distributive property. Suitable for students in Grades 6-8.

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