Add negative numbers
5 + -2 =
3
6 - -3 =
9
4a + 2a
6a
a = 2
3a + 1
7
a + 2 = 3
a = 1
11 + -7 =
4
17 - -7 =
24
3a + 5b + 8a -9b
11a - 4b
a = 4 b = 7
a + 3b + 2a
33
9 + a = 13
a = 4
14 + -23 =
3
4(a + 3)
4a + 12
a = 5
6(a + 3)
48
a = 7 or -a = -7
15
69 - - 13
82
6(3a - 7)
18a - 42
a = 9 b = 3
2a + 5ab
153
a + 2 - 7 = 5
a = 10
-119
a = -3 b = 8
-2(a + 3b)
28 - a - 14 = 19
a = -5 or -a = 5