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x in (-oo:+oo)
x*(624-((2*x)/3)) = 0
x*((-2/3)*x+624) = 0
x*(624-2/3*x) = 0
( 624-2/3*x )
624-2/3*x = 0 // - 624
-2/3*x = -624 // : -2/3
x = -624/(-2/3)
x = 936
( x )
x = 0
x in { 936, 0 }
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