[tex]\frac{13}{6}- \frac{b}{6}= \frac{2}{4} -\frac{0.5b}{4} \\\\\frac{13}{3}- \frac{b}{3}= 1 -\frac{b}{4}\\\\\frac{10}{3}= -\frac{b}{4}+\frac{b}{3}\\\\\frac{10}{3}= -\frac{3b}{12}+\frac{4b}{12}\\\\\frac{40}{12}= \frac{b}{12}\\\\\\b=40\\[/tex]
Hope I helped!
