braidenroach braidenroach 21-11-2022 Mathematics contestada If [tex]\frac{a+b}{2a-b} = \frac{5}{4}[/tex] and [tex]\frac{b}{a+9} =\frac{5}{9}[/tex], find the value of b. A. 5 B. 18 C. 30 D. 45 (Answer is A. 5)