How do you solve for: 6 + 4/5b = 9/10b?

b=60

Step-by-step explanation:

6+4/5b=9/10b

6=9/10b-4/5b

6=9/10b-8/10b

6=1/10b

b=6/(1/10)

b=(6/1)(10/1)

b=60/1

b=60

the correct is answer is a 9-sided polygon!