Step-by-step explanation:
[tex](\frac{5}{7}x+\frac{1}{3} )+(\frac{3}{7}x+\frac{5}{7} )[/tex]
Combine your like terms.
[tex](\frac{5}{7}x+\frac{3}{7}x) +(\frac{1}{3} +\frac{5}{7} )[/tex]
[tex]\frac{8}{7} x+\frac{22}{21}[/tex]
So your answer is letter choice A.
