Example

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

Question

$$\left. \begin{array} { l } { - 7 x y q ^ { 2 } - 5 x - 5 y + k = 0 } } \\ { \text { 0 f \right.$$

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