please help, im so confused.
Find the y values that will make each ordered pair a solution to the equations.
9. 5x + y = 15 (3, y) (4, y)

10. 2x + 3y = 6 (6, y) (2, y)

11. 6x – y = 0 (0, y) (1/2, y)

12. 2 x – 3y = 2 (1, y) (-1/2,y)

13. 7x + 3y = -4 (-4, y) (2, y)