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x in (-oo:+oo)
1.28 = x-(8/3) // - x-(8/3)
8/3-x+1.28 = 0
3.94666667-x = 0 // - 3.94666667
-x = -3.94666667 // * -1
x = 3.94666667
x = 3.94666667
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