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x in (-oo:+oo)
(-2/5)*(4*x-6) = 0
-2/5*(4*x-6) = 0
( -2/5 )
-2/5 = 0
x belongs to the empty set
( 4*x-6 )
4*x-6 = 0 // + 6
4*x = 6 // : 4
x = 6/4
x = 3/2
x = 3/2
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