17
41
-17
34
68
-34
27
4
324
21
4
-4
X + 7
7x
2x + 7
X - 14
2 + 14
X + 14
X - 15
15 - x
20-15
X÷15
15÷x
15x
14
-14
5
40
43
51
8
16
64
12
4
3
-11
11
2
7.2
6
12
21
25
44
36
15
12
19
58
60
19
2
5
8
119
2,312
Subtract 12 from 12m, then subtract 12 from 144
Add 12 to 12m, then add 12 to 144
Multiply 12m by 12, then multiply 144 by 12
Divide 12m by 12, then divide 144 by 12