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7*((8/35)*x-(4/7)) = 0
7*((8/35)*x-4/7) = 0
7*(8/35*x-4/7) = 0
( 7 )
7 = 0
x belongs to the empty set
( 8/35*x-4/7 )
8/35*x-4/7 = 0 // + 4/7
8/35*x = 4/7 // : 8/35
x = 4/7/8/35
x = 5/2
x = 5/2
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