Can someone explain I am really behind and I don’t understand .

Answer:
¹¹/₁₅ x + 13
Step-by-step explanation:
⅓ x + 5 + 8 + ⅖ x
Combine like terms.
⅓ x + ⅖ x + 13
(⅓ + ⅖) x + 13
Combine fractions using common denominator.
(⁵/₁₅ + ⁶/₁₅) x + 13
¹¹/₁₅ x + 13