1. Let's start by understanding the problem: You want to calculate $\Delta L$, which is given as $x$.\n\n2. Typically, $\Delta L$ represents a change in length, and it can be calculated using formulas depending on the context (e.g., thermal expansion, stretching, etc.).\n\n3. For example, in thermal expansion, the formula is $$\Delta L = L_0 \alpha \Delta T$$ where $L_0$ is the original length, $\alpha$ is the coefficient of linear expansion, and $\Delta T$ is the change in temperature.\n\n4. If $\Delta L$ is given as $x$, then you are essentially solving for $x$ using the formula relevant to your problem.\n\n5. To calculate $x$, identify the known variables and plug them into the formula, then solve for $x$.\n\n6. If you provide the specific formula or context, I can help you with the exact calculation steps.