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2*x-(1/2) = 54 // - 54
2*x-(1/2)-54 = 0
2*x-1/2-54 = 0
2*x-109/2 = 0 // + 109/2
2*x = 109/2 // : 2
x = 109/2/2
x = 109/4
x = 109/4
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