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x=1/2x+1/2+1/2
x-1/2x=1
-1/2x=1 | *(-2)
x=-2
2. 4 - x-2/3 =-x +2(x-1)/3
-x=-x+(2x-2)/3-4+2/3
-x+x=2/3x-2/3-4+2/3
2/3x=-4 | *3/2
x=-6
3.1/2x + 1/3 =x-1/6 x
1/2x-x+1/6x=1/3
-2/6x=1/3
-1/3x=1/3 |*(-3)
x=-1