Example

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

Question

$$=\frac{6.7\times10^{-11}\times6\times10^{24}\times7.4\times10^{22}}{(3.84\times10^{8})^{2}}$$

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