Answer:
[tex] \frac{1}{3} (y + 7) = 3(y - 1)[/tex]
[tex]y + 7 = 9(y - 1)[/tex]
[tex]y + 7 = 9y - 9[/tex]
[tex]8y = 16[/tex]
[tex]y = 2[/tex]
