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x in (-oo:+oo)
(1/6)*(2*x-57) = 0
1/6*(2*x-57) = 0
( 1/6 )
1/6 = 0
x belongs to the empty set
( 2*x-57 )
2*x-57 = 0 // + 57
2*x = 57 // : 2
x = 57/2
x = 57/2
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