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x in (-oo:+oo)
(1/2)*(2-(2*x))+3 = 0
(1/2)*(2-2*x)+3 = 0
1/2*(2-2*x)+3 = 0
1/2*(2-2*x)+3 = 0
4-x = 0
4-x = 0
4-x = 0 // - 4
-x = -4 // * -1
x = 4
x = 4
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