Subtract the constant from both sides to get 5x < 25. Because 5 is positive, dividing by 5 keeps the inequality direction unchanged. So the solution is x < 5. Solve an inequality much like an equation: isolate x step by step. Since the division here is by a positive number, the inequality sign stays in the same direction. The final answer represents a range of values, not just one value. The correct answer is x < 5, which matches the calculation or reasoning shown.