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x in (-oo:+oo)
(1/4)*x-(1/2) = 2 // - 2
(1/4)*x-(1/2)-2 = 0
(1/4)*x-1/2-2 = 0
1/4*x-5/2 = 0 // + 5/2
1/4*x = 5/2 // : 1/4
x = 5/2/1/4
x = 10
x = 10
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