\(a,\Leftrightarrow\left\{{}\begin{matrix}2a+b=2\\a+b=3\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=-1\\b=4\end{matrix}\right.\\ b,\Leftrightarrow\left\{{}\begin{matrix}b=3\\a\sqrt{2}+b=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=-\dfrac{3}{\sqrt{2}}\\b=3\end{matrix}\right.\\ c,\Leftrightarrow\left\{{}\begin{matrix}a=3;b\ne1\\4a+b=-5\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=3\\b=-17\end{matrix}\right.\)
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