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2x-1=2/3*(1-2x)
2x-1=2/3-4/3x
2x+1i1/3x=2/3+1
3i1/3x=1i2/3
10/3x=5/3 /*3/10
x=5/3*3/10
x=1/2
(0,4x-1)/3=(2x-5)/2 /*6
2(0,4x-1)=3(2x-5)
0,8x-2=6x-15
0,8x-6x=-15+2
-5,2x=-13 /:(-5,2)
x=2i1/2
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