Answer: 8
Step-by-step explanation:
20/8= 2.5
[tex]\frac{20}{x}=2\frac{1}{2}[/tex]
[tex]\frac{20}{x}=\frac{5}{2}[/tex]
[tex]\frac{20}{x}=\frac{20}{8}[/tex]
[tex]x=\boxed8[/tex]
