<u><em>b=108 is the correct answer.</em></u>First you had to multiply by 9 from both sides of equation, and it gave us, . And then simplify, and it gave us, . You can also divide by 2 from both sides of equation, and it gave us, . And finally simplify, and it gave us the answer is 216/2=108, or<u><em>b=108 is the correct answer.</em></u>Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie