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(3/2)*(13.5*x-108) = 0
3/2*(13.5*x-108) = 0
( 13.5*x-108 )
13.5*x-108 = 0 // + 108
13.5*x = 108 // : 13.5
x = 108/13.5
x = 8
( 3/2 )
3/2 = 0
x belongs to the empty set
x = 8
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