1. 6s 2s - 3s - 6 =
2. 10t - 4t -6 5t =
3. 18r 18r 9r - 3r =
4. 20 - 4q 40r - 16 =
5. 17st - 16s t =
6. 101 101x - x =
7. 16a^2 - 14a a^2 - 3a
8. 14t 14t t =
9. r s rs s rs s=
10. 54 pt - 3p 4t - 3pt =
11. 14x^2 3x^2 - x =
12. 101c - 5c 4c =
13. 12q - 4 10q - 4q 9 =
14. 21k - 20k 3k =
15. 181x 91x - 23x =