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(1/14)*(x-(4*y)-(5*z)) = 0
(1/14)*(x-4*y-5*z) = 0
1/14*(x-4*y-5*z) = 0
( 1/14 )
1/14 = 0
x belongs to the empty set
( x-4*y-5*z )
x-4*y-5*z = 0 // + -4*y-5*z
x = -(-4*y-5*z)
x = -(-4*y-5*z)
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