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x in (-oo:+oo)
x = (1/2)*(16-(8*x)) // - (1/2)*(16-(8*x))
x-((1/2)*(16-(8*x))) = 0
(-1/2)*(16-8*x)+x = 0
x-1/2*(16-8*x) = 0
x-1/2*(16-8*x) = 0
5*x-8 = 0
5*x-8 = 0
5*x-8 = 0 // + 8
5*x = 8 // : 5
x = 8/5
x = 8/5
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