Example

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

Question

$$[\begin{matrix}a+c&a+2b\\ c-1&4d-6\end{matrix}]=[\begin{matrix}0&-7\\ 3&2d\end{matrix}]$$

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