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x in (-oo:+oo)
(2*(x+1/2))/4 = 2*x // - 2*x
(2*(x+1/2))/4-(2*x) = 0
(2*(x+1/2))/4-2*x = 0
(2*(x+1/2))/4+(-2*4*x)/4 = 0
2*(x+1/2)-2*4*x = 0
1-6*x = 0
(1-6*x)/4 = 0
(1-6*x)/4 = 0 // * 4
1-6*x = 0
1-6*x = 0 // - 1
-6*x = -1 // : -6
x = -1/(-6)
x = 1/6
x = 1/6
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