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x in (-oo:+oo)
(11/12)*(x-(2*y)-(3*z)) = 0
(11/12)*(x-2*y-3*z) = 0
11/12*(x-2*y-3*z) = 0
x-2*y-3*z = 0 // + -2*y-3*z
x = -(-2*y-3*z)
x = -(-2*y-3*z)
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