tolong jawabannya buat nilai remedial

9.
2x - 11 - 3 = 4 - x
2x + x = 4 + 11 + 3
3x = 18
X = 18/3
X = 6

2.6 - 11 - 3 = 4 - 6
12-11-3 = - 2
1-3 = - 2
-2 = - 2

10.