Example

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

Question

$$\left[\begin{matrix} 10 & 20 & 30 \\40 & 50 & 60 \\70 & 80 & 90 \end{matrix}\right]$$

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