Example

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

Question

$$|2 \times { 10 }^{ -7 } \times 4.5 \times { 10 }^{ -7 } |/0.1$$

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