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2 - x = x + 1
2 + (- x -x ) = (x - x) +1
-2x + 2 = (x - x) +1
2 - 2x = 1
(2 - 2 ) - 2x = 1 - 2
-2x = 1 - 2
-2x = -1
(-2x/-2) = (-1/-2)
x = 1/2
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