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(13/16)*(x-(5*y)-(4*z)) = 0
(13/16)*(x-5*y-4*z) = 0
13/16*(x-5*y-4*z) = 0
x-5*y-4*z = 0 // + -5*y-4*z
x = -(-5*y-4*z)
x = -(-5*y-4*z)
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