Answer:
[tex] \dfrac{y}{2} [/tex]
Step-by-step explanation:
The LCD of 13 and 26 is 26.
[tex] \dfrac{3y}{13} + \dfrac{7y}{26} = [/tex]
[tex] = \dfrac{2 \times 3y}{2 \times 13} + \dfrac{7y}{26} [/tex]
[tex] = \dfrac{6y}{26} + \dfrac{7y}{26} [/tex]
[tex] = \dfrac{13y}{26} [/tex]
[tex] = \dfrac{y}{2} [/tex]
