Example

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

Question

$$\left. \begin{array} { l } { 4 = 2 x y } \\ { \text { m e x t a h y a n g f a r i a \right.$$

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