Example

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

Question

$$=9\times10^{9}\times\frac{(2\times10^{-})(3\times10^{-6})}{(0.20)^{2}}along$$

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