Răspuns:
12).b).
11x-33=6x-8
11x-6x=-8+33
5x=25
x=5
e). 12x-30+6x-8=12x+4
18x-12x=4+38
6x=42
x=7
13). x-6=3
x=3+9
x=9
2x-4=8
2x=8+4
2x=12
x=6
6x-12=42
6x=42+12
6x=54
x=9
5x+15-32=-2
5x=-2+32-15
5x=15
x=3
3x-2=10
3x=10+2
3x=12
x=4
destul pt 5 puncte....