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x= 16
F. 2x=8+4
2x=12 /:2
x=6
I. 6x-6=5x-9
6x-5x=-9+6
x=-3
N. -20x-8=2-10x
-20x+10x=2+8
-10x=10 /:(-10)
x=-1
A. 6x+2=2x-6
6x-2x=-6-2
4x=-8 /:4
x=-2
O. -28+20x=12
20x=12+28
20x=40
x=2
S. 5x-4x=7+3
x=10
D. 2x-4x+12=2
2x-4x=2-12
-2x=-10 /:(-2)
x=5