2. \( 3 x+5 \lambda-2 x-4 \)

Let's simplify the expression first! Combining like terms, we have \( (3x - 2x) + 5\lambda - 4 \), which simplifies to \( x + 5\lambda - 4 \). Neat, isn't it? This expression now clearly shows how \( x \) and \( \lambda \) are related. In practical terms, you might encounter equations like this in fields such as physics or economics, where variables often represent quantities that depend on one another. If you have a situation where you need to optimize a resource or solve for a variable, this expression can serve as part of a larger system—just remember to combine similar terms for clarity!