A) 9x-3x = -11-7
6x= -18/:6
X= -3
B) 2x+2x= 29-7
4x = 22/:4
X= 5,5
C) -7x-4x = -19-3
-11x = -22/-11
X = 2
D) 5x-3x = 18-7
2x = 11/:2
X= 5,5
E) 6x-3x = -9+15
3x = 6/:3
X=2
F) 2x + 12 = 28-2x
2x+2x = 28-12
4x = 16/:4
X=4
G)12x-3x = 20+7
9x = 27/:9
X=3
H) 2x+4 = 5x-5
2x-5x = -5-4
-3x = -9/:-3
X= 3
I) 3x-11x = 20+2
-8x = 22/:-8
X=-2,75