1. The problem is to understand how to approach a mathematical-physics equation. 2. Generally, such equations combine mathematical formulas with physical principles. 3. Start by identifying the physical quantities involved and their units. 4. Write down the relevant physical laws or formulas that apply to the problem. 5. Substitute known values into the formula. 6. Perform algebraic manipulations to isolate the unknown variable. 7. Simplify the expression step-by-step, carefully handling units and constants. 8. Calculate the numerical value of the unknown. 9. Check the result for physical plausibility and correct units. This general approach helps solve most mathematical-physics equations systematically.