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x in (-oo:+oo)
x-x-(2/3)-(8/4) = x-(4/5) // - x-(4/5)
x-x-x-(2/3)-(8/4)+4/5 = 0
x-x-x-2/3+4/5-2 = 0
-x-28/15 = 0 // + 28/15
-x = 28/15 // * -1
x = -28/15
x = -28/15
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