adding
3 + a = 8
5
a - 5 = 4
9
-5 + a = 5
10
5a = 25
5
a/9 = 9
81
8 + a = -2
-10
a - 10 = 13
23
18 = a -18
36
25a = 625
25
a/7 = 5
35
21 + a = -6
-27
-10 + a = 8
18
a/-20 = -2
40
-7a = 63
-9
a/ -10 = 4
-40
-30 = 120 + a
-150
-15 = a - 15
0
a + 501 = -546
-45
-17a = -34
2
a/12 = -4
-48
-6 = 12 + a
-18
-28 = a + 48
-76
16a = -3
-48
8a = -24
-3
b/-12 = -7
84