1：13x-14
2:-6x+21
3: 20x-18
4:5x+15
5:14n+36
6:-12n+17
7:8n+32
8:k-11
9:-7k+37
10:-13k+34
11:2k+7
12:x+52
13:-2x+21
14:3x+21
15:12y-11
16:-26u+25
17:-42u+42
18:13u-7
Step-by-step explanation:
