[tex]\large\sf{}4y + 6 = 2y - 10 + 9 \\ \large\sf{}4y + 6 = 2y - 1 \\ \large\sf{}4y + 6 - 2y = - 1 \\ \large\sf{}4y - 2y = - 1 - 6 \\ \large\sf{}2y = - 1 - 6 \\ \large\sf{}2y = - 7 \\ \\ \large\sf{}y = - \dfrac{7}{2} \\ \\ {\large\boxed{\boxed{  { \large \sf y = - 3,5}}}}[/tex]

[tex]{\large\boxed{\boxed{  { \large \sf Bons~Estudos }}}}[/tex]