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1/3x-x=2+2
-2/3x=4 /*-3
2x=-12
x = 6
b)
-2(2x-1)=x/3
-4x+2=x/3 /*3
-12x + 6=x
6=13x
x=6/13
c)1/9 (x-3)=9-x
1/9x - 1/3 = 9-x
1 1/9x = 9 1/3 /*9
10x= 84
x= 8 2/5