Simplifying the right side of the inequality gives: 2x - 5 <= -8x + 30
Combining terms with x on the left side: 10x - 5 <= 30
Adding 5 to both sides: 10x <= 35
Dividing both sides by 10 (and flipping the inequality since we're dividing by a positive number): x <= 3.5
Therefore, the solution is the set of all real numbers less than or equal to 3.5. We can express this mathematically as: x ∈ {real numbers | x ≤ 3.5}.