Lös ut α
\left\{\begin{matrix}\alpha \geq -\frac{x_{2}-600}{x_{1}}\text{, }&x_{1}<0\\\alpha \in \mathrm{R}\text{, }&x_{2}\leq 600\text{ and }x_{1}=0\\\alpha =-\frac{x_{2}-600}{x_{1}}\text{, }&x_{2}\leq 600\text{ or }x_{1}\neq 0\\\alpha \leq -\frac{x_{2}-600}{x_{1}}\text{, }&x_{1}>0\end{matrix}\right,
Lös ut x_2
x_{2}\leq 600-x_{1}\alpha
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