Answer:
Step-by-step explanation:
[tex]\frac{1}{5}+\frac{1}{3}+x=1[/tex]
[tex]\frac{3}{15}+\frac{5}{15}+x=\frac{1.15}{15}[/tex]
[tex]\frac{8}{15} + x=\frac{15}{15}[/tex]
[tex]\frac{8}{15} - \frac{8}{15} + x=\frac{15}{15}-\frac{8}{15}[/tex]
[tex]x=\frac{7}{15}[/tex]
I think you are missing the question but I bet you are looking for the rest of chocolate in the box.