Question

Please solve 6+4/5b=9/10b

Answer 1

I think b = 1 over 60 
6+ 4 over 5b = 9 over 10b.
(6+ 4 over 5b)*10b = 9
30b + 4 over 5b*10b= 9 
(30b+4)*2=9
60b+8=9
60b=9-8
60b=1
b=1/60, b 0. 
b = 1/60 or 60. 
I could be wrong.