slasher91 slasher91 11-02-2021 Mathematics contestada Pls help!!! Will mark Brainiest! Factor each expression using the GCF. Check your work using the Distributive Property. 9. 3x + 12 10. 6x - 30 11. 20x - 16 12.-50x + 80 13. 77 + 22x 14. 21x - 14