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2*x-(1/4) = 5.25 // - 5.25
2*x-(1/4)-5.25 = 0
2*x-1/4-5.25 = 0
2*x-5.5 = 0 // + 5.5
2*x = 5.5 // : 2
x = 5.5/2
x = 2.75
x = 2.75
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