wikiHow Subtracting Variables Practice Problems and Answers Note: These problems involve subtracting two algebraic expressions with variables. 1. Subtract: 3x - 2x 2. Subtract: 6y - 3y 3. Subtract: 2z - z 4. Subtract: 4a - 2a 5. Subtract: 5b - 3b 6. Subtract: 8c - 5c 7. Subtract: 2d - d 8. Subtract: 9e - 4e 9. Subtract: 10f - 5f 10. Subtract: 7g - 2g 11. Subtract: 5x - 3y 12. Subtract: 8a - 4b 13. Subtract: 12c - 5d 14. Subtract: 7f - 2g 15. Subtract: 9x - 4y 16. Subtract: 3a - 2b 17. Subtract: 11c - 3d 18. Subtract: 6f - 3g 19. Subtract: 8x - 2y 20. Subtract: 5a - 3b Answer Key: 1. x 2. 3y 3. z 4. 2a 5. 2b 6. 3c 7. d 8. 5e 9. 5f 10. 5g 11. 5x - 3y 12. 8a - 4b 13. 12c - 5d 14. 7f - 2g 15. 9x - 4y 16. 3a - 2b 17. 11c - 3d 18. 6f - 3g 19. 8x - 2y 20. 5a - 3b Page