Example

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

Question

$$(\frac{9}{5})^{-3}\times(\frac{12}{7})^{0}\times(5)^{-3}\times(\frac{1}{9})^{-1}$$

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