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x in (-oo:+oo)
0 = (4*x-5)/7 // - (4*x-5)/7
0-((4*x-5)/7) = 0
-((4*x-5)/7) = 0
(-1*(4*x-5))/7 = 0
( -1 )
-1 = 0
x belongs to the empty set
( 4*x-5 )
4*x-5 = 0 // + 5
4*x = 5 // : 4
x = 5/4
x = 5/4
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