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(3/5)*(4*x-8) = 0
3/5*(4*x-8) = 0
( 3/5 )
3/5 = 0
x belongs to the empty set
( 4*x-8 )
4*x-8 = 0 // + 8
4*x = 8 // : 4
x = 8/4
x = 2
x = 2
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