Let's simplify the expression:

\[
-2.4x + 3.8x - x
\]

First, combine the like terms:

\[
(-2.4 + 3.8 - 1)x = 0.4x
\]

So, the simplified expression is:

\[
0.4x
\]

Would you like further details or explanations? 

Here are some related questions you might consider:
1. How do you simplify expressions with multiple variables?
2. What happens when coefficients are fractions or decimals?
3. How can you factor a linear expression like this one?
4. How would you solve \( 0.4x = 10 \)?
5. What are some common errors when simplifying algebraic expressions?

**Tip:** Always group like terms (terms with the same variable) when simplifying expressions.

Learn how to simplify the linear expression -2.4x + 3.8x - x with a step-by-step solution. This problem covers key algebraic concepts like combining like terms, making it suitable for students in Grades 6-8.

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