Example

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

Question

$$\left( \begin{array} { l l } { 2 } & { - 3 } \\ { 4 } & { 7 } \end{array} \right)$$

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