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X-(2/3) = 2-(x/2) // - 2-(x/2)
X+x/2-(2/3)-2 = 0
X+x/2-2/3-2 = 0
X+1/2*x-8/3 = 0 // - X-8/3
1/2*x = -(X-8/3) // : 1/2
x = (-(X-8/3))/1/2
x = 2*(8/3-X)
x = 2*(8/3-X)
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