Example

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

Question

$$\left. \begin{array} { l } { 4 / 1 / 3 n - 2 } \\ { - 9 e ^ { 2 t } n - 1 n ^ { \right.$$

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