First, change the given fractions to improper fractions:
3[tex]\frac{3}{5}=\frac{18}{5}[/tex]
2[tex]\frac{7}{10}=\frac{27}{10}[/tex]
6[tex]\frac{1}{2}=\frac{13}{2}[/tex]
Find LCD which is 10
[tex]\frac{36}{10}+\frac{27}{10}+\frac{65}{10}[/tex]
[tex]\frac{128}{10}[/tex]
Change to Mixed fraction
12[tex]\frac{8}{10}[/tex]
Simplify:
12[tex]\frac{4}{5}[/tex]
Hope this helps =)