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x in (-oo:+oo)
(-1/8)*((4/5)*x-24) = 0
-1/8*(4/5*x-24) = 0
( -1/8 )
-1/8 = 0
x belongs to the empty set
( 4/5*x-24 )
4/5*x-24 = 0 // + 24
4/5*x = 24 // : 4/5
x = 24/4/5
x = 30
x = 30
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