Answer:
11. 7
12. -2
Step-by-step explanation:
11. 3x + 9 = 44 - 2x
-9 -9
3x = 35 - 2x
+2x +2x
5x = 35
----- ------
5 5
x = 7
12. 3x + 6 = x + 2
-6 -6
3x = x - 4
-x -x
2x = -4
---- -----
2 2
x = -2
