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4.8;3
(1/4)*(8*x-3) = 2*x-3
-4 = (2/5)*x
f+0.75*u-(2.25*v)-8;f-3.25*u-(0.75*v)+10;2.5*f+1.5*u+0.5*v
3*x^3+1*x^2-(12*x)-4 = 0
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