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x in (-oo:+oo)
(2/3)*(4*x-9) = 0
2/3*(4*x-9) = 0
( 2/3 )
2/3 = 0
x belongs to the empty set
( 4*x-9 )
4*x-9 = 0 // + 9
4*x = 9 // : 4
x = 9/4
x = 9/4
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