1. Solve x + 1 = 3
3
2
1
4
2. Solve x + 5 = 7
12
3
2
7
3. Solve x + 10 = 15
3
5
25
15
4. Solve y + 30 = 43
33
30
16
13
5. Solve y + 12 = 21
12
8
9
11
6. Solve x - 1 = 2
1
2
3
4
7. Solve x - 3 = 5
8
12
15
6
8. Solve y - 11 = 21
12
11
30
32
9. Solve y - 41 = 66
101
55
107
21
10. Solve y - 1 = 1
1
2
11
12