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x -
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2x - [ (2x - 3 - x) / 4 ] = 6 - 1/2(1 - 2 + 1/3x)
2x - 1/4(x - 3) = 6 - 1/2(-1 + 1/3x) ------- / * 4
8x - 1(x - 3) = 24 - 2(- 1 + 1/3x)
8x - x + 3 = 24 + 2 - 2/3x
7x + 3 = 26 - 2/3x
7x + 2/3x = 23---- / * 3
21x + 2x = 69
23x = 69
x = 3
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2x - [ (2x - 3 - x) / 4 ] = 6 - 1/2(1 - 2 + 1/3x)
2x - 1/4(x - 3) = 6 - 1/2(-1 + 1/3x) ------- / * 4
8x - 1(x - 3) = 24 - 2(- 1 + 1/3x)
8x - x + 3 = 24 + 2 - 2/3x
7x + 3 = 26 - 2/3x
7x + 2/3x = 23---- / * 3
21x + 2x = 69
23x = 69
x = 3