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(4*b)/4+n/2-(6/2) = 12/8 // - 12/8
(4*b)/4+n/2-(6/2)-(12/8) = 0
(4*b)/4+n/2-3/2-3 = 0
b+1/2*n-9/2 = 0
x naleu017Cy do R
x in (-oo:+oo)
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