Jawabanmu

2014-01-21T19:52:20+07:00
2z + 11 = -2
2z = -2 -11
2z = -13
z = -13/2

8 - 4x = 6
-4x = 6 - 8
-4x = -2
x = 2

3a - 2 = -a + 18
3a + a = 18 + 2
4a = 20
a = 5

3 - x = x - 3
-x - x = -3 -3
-2x = -6
x = 3