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x in (-oo:+oo)
(1/2)*(x-0.25) = 0.5 // - 0.5
(1/2)*(x-0.25)-0.5 = 0
1/2*(x-0.25)-0.5 = 0
1/2*(x-0.25)-0.5 = 0
1/2*x-0.625 = 0
1/2*x-0.625 = 0
1/2*x-0.625 = 0 // + 0.625
1/2*x = 0.625 // : 1/2
x = 0.625/1/2
x = 1.25
x = 1.25
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