Answer:
1. 11x
2. 5x+7
3. 5x+8
4. 8x+9y
5. x+8y+12
6. 12x+3y
7. 10a+7b+4
8. 19a+11
9. a+16b+10
10. 13a+9b+11
11. 12a+2b+24
12. 4a+3b+1
13. 8x+6
14. 11x+20
15. 4x+27
16. 11x+8y
17. 5x+3y+18
18. 7x+15y+30
19. 7x+7y
20. 5x+10y+33
21. 2x+7y+37
22. 9x+7y+9
23. x+2x+7+3x+1= 6x+8
24. 3x+x+x+5+x+5+2x+3= 8x+13
Explanation:
Like variables can be added together and simplified. Like variables are things like 2x and 4x. They both have x. This works for y,z, etc...