Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$A=(\begin{matrix}1&-4\\ -1&1\end{matrix})$$

Assign A

$A≔\left(\begin{matrix}1&-4\\-1&1\end{matrix}\right)$

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