Answer:
17. 3, 7x, 3x, x
18. y, 3y, 8y, 2
19. 2a, 5a, a, 6a
20. 5c, 2d, 3d, d
21. 6m, 2n, 7
22. 7x, 3y, 3z, 2
Step-by-step explanation: