18b+18b–11≤–3(–11b–2)–20

Sure, let's solve this inequality step by step:

1. Simplify the left side of the inequality: 18b + 18b - 11 = 36b - 11
2. Distribute the -3 on the right side of the inequality: -3(-11b - 2) - 20 = 33b + 6 - 20 = 33b - 14
3. So the inequality becomes: 36b - 11 ≤ 33b - 14
4. Subtract 33b from both sides: 36b - 33b ≤ -14 + 11
5. This simplifies to: 3b ≤ -3
6. Finally, divide both sides by 3 to solve for b: b ≤ -1

So the solution to the inequality is b ≤ -1.