An unknown entry in a product

An unknown entry in a product

Secondary 3
3 marks
TGM Original Questions

Given \(\begin{pmatrix}2&1\\ 1&3\end{pmatrix}\begin{pmatrix}x\\ 4\end{pmatrix}=\begin{pmatrix}14\\ y\end{pmatrix}\), find \(x\) and \(y\).[3]

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Answer:\(x=5,\quad y=17\).

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