Answer:
Step-by-step explanation:
[tex]x+7\frac{1}{3}=18\ frac{2}{3}\\ \\ x+\frac{22}{3}=\ frac{56}{3}\\ \\ x=\frac{56-22}{3}\\ \\ x=\frac{34}{3}\\ \\ x=11\frac{1}{3}[/tex]