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